diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools.py b/extensions/fablabchemnitz/vpypetools/vpypetools.py
index 55c951b2..eabd5f7c 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools.py
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools.py
@@ -30,7 +30,7 @@ Extension for InkScape 1.X
 Author: Mario Voigt / FabLab Chemnitz
 Mail: mario.voigt@stadtfabrikanten.org
 Date: 02.04.2021
-Last patch: 06.04.2021
+Last patch: 08.04.2021
 License: GNU GPL v3
 
 This piece of spaghetti-code, called "vpypetools", is a wrapper to pass (pipe) line elements from InkScape selection (or complete canvas) to vpype. 
@@ -67,10 +67,6 @@ class vpypetools (inkex.EffectExtension):
         self.arg_parser.add_argument("--linemerge_tolerance", type=float, default=0.500, help="Maximum distance between two line endings that should be merged (default 0.500 mm)")
         self.arg_parser.add_argument("--linemerge_no_flip", type=inkex.Boolean, default=False, help="Disable reversing stroke direction for merging")
   
-        # Line Simplification
-        self.arg_parser.add_argument("--linesimplify", type=inkex.Boolean, default=False)
-        self.arg_parser.add_argument("--linesimplify_tolerance", type=float, default=0.050, help="The resulting geometries' points will be at a maximum distance from the original controlled by the (default 0.05 mm)")  
-        
         # Trimming
         self.arg_parser.add_argument("--trim", type=inkex.Boolean, default=False)
         self.arg_parser.add_argument("--trim_x_margin", type=float, default=0.000, help="trim margin - x direction (mm)") # keep default at 0.000 to keep clean bbox
@@ -120,13 +116,15 @@ class vpypetools (inkex.EffectExtension):
         self.arg_parser.add_argument("--input_handling", default="paths", help="Input handling")
         self.arg_parser.add_argument("--flattenbezier", type=inkex.Boolean, default=False, help="Flatten bezier curves to polylines")
         self.arg_parser.add_argument("--flatness", type=float, default=0.1, help="Minimum flatness = 0.1. The smaller the value the more fine segments you will get (quantization).")
+        self.arg_parser.add_argument("--simplify", type=inkex.Boolean, default=False, help="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'")
+        self.arg_parser.add_argument("--parallel", type=inkex.Boolean, default=False, help="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'")
         self.arg_parser.add_argument("--apply_transformations", type=inkex.Boolean, default=False, help="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting")
         self.arg_parser.add_argument("--output_show", type=inkex.Boolean, default=False, help="This will open a new matplotlib window showing modified SVG data")
         self.arg_parser.add_argument("--output_stats", type=inkex.Boolean, default=False, help="Show output statistics before/after conversion")
         self.arg_parser.add_argument("--output_trajectories", type=inkex.Boolean, default=False, help="Add paths for the travel trajectories")
-        self.arg_parser.add_argument("--keep_selection", type=inkex.Boolean, default=False, help="If false, selected paths will be removed")
+        self.arg_parser.add_argument("--keep_objects", type=inkex.Boolean, default=False, help="If false, selected paths will be removed")
         self.arg_parser.add_argument("--strokes_to_paths", type=inkex.Boolean, default=True, help="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects")
-        self.arg_parser.add_argument("--use_style_of_first_element", type=inkex.Boolean, default=True, help="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines")
+        self.arg_parser.add_argument("--use_style_of_first_element", type=inkex.Boolean, default=True, help="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'")
         self.arg_parser.add_argument("--lines_stroke_width", type=float, default=1.0, help="Stroke width of tooling lines (px). Gets overwritten if 'Use style of first selected element' is enabled")
         self.arg_parser.add_argument("--trajectories_stroke_width", type=float, default=1.0, help="Stroke width of trajectory lines (px). Gets overwritten if 'Use style of first selected element' is enabled")
  
@@ -213,8 +211,7 @@ class vpypetools (inkex.EffectExtension):
             doc.add(lc, layer_id=None) # we add the lineCollection (converted selection) to the vpype document
             
         elif self.options.input_handling == "layers":
-            doc = vpype.read_multilayer_svg(self.options.input_file, quantization = self.options.flatness, crop = False, simplify = False, parallel = False, \
-                default_width = self.document.getroot().get('width'), default_height = self.document.getroot().get('height'))
+            doc = vpype.read_multilayer_svg(self.options.input_file, quantization = self.options.flatness, crop = False, simplify = self.options.simplify, parallel = self.options.parallel, default_width = self.document.getroot().get('width'), default_height = self.document.getroot().get('height'))
 
             for node in self.document.getroot().xpath("//svg:g", namespaces=inkex.NSS): #all groups/layers
                 nodesToWork.append(node)
@@ -238,10 +235,6 @@ class vpypetools (inkex.EffectExtension):
             if self.options.linemerge_no_flip is True:
                 command += " --no-flip"
  
-        # Line Simplification
-        if self.options.linesimplify is True:     
-            command = "linesimplify --tolerance " + str(self.options.linesimplify_tolerance)
- 
         # Trimming
         if self.options.trim is True:     
             command = "trim " + str(self.options.trim_x_margin) + " " + str(self.options.trim_y_margin)
@@ -411,7 +404,7 @@ class vpypetools (inkex.EffectExtension):
             os.remove(output_file)
             
         # Remove selection objects to do a real replace with new objects from vpype document
-        if self.options.keep_selection is False:
+        if self.options.keep_objects is False:
             for node in nodesToWork:
                 node.getparent().remove(node)
     
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_filter.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_filter.inx
index 504ccf65..335b4697 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_filter.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_filter.inx
@@ -2,37 +2,54 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Filter</name>
     <id>fablabchemnitz.de.vpype_filter</id>
-	<label appearance="header">Filter</label>
-	<label>Filter paths according to specified criterion. When an option is provided the corresponding criterion is applied and paths which do not respect the criterion are rejected.</label>
- 	<param name="filter" type="bool" gui-hidden="true">true</param>
-	<param name="filter_tolerance" type="float" min="0.000" max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Tolerance used to determined if a line is closed or not (default 0.050 mm)">0.050</param>   
-	<param name="filter_closed" type="bool" gui-text="Keep closed lines">false</param>
-	<param name="filter_not_closed" type="bool" gui-text="Keep open lines">false</param>
-	<param name="filter_min_length_enabled" type="bool" gui-text="filter by min length">false</param>
-	<param name="filter_min_length" type="float" min="0.000" max="99999.000" precision="3" gui-text="minimum length (mm)" gui-description="Keep lines whose length isn't shorter than value">0.000</param>
-	<param name="filter_max_length_enabled" type="bool" gui-text="filter by max length">false</param>
-	<param name="filter_max_length" type="float" min="0.000" max="99999.000" precision="3" gui-text="maximum length (mm)" gui-description="Keep lines whose length isn't greater than value">0.000</param>
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>Filter paths according to specified criterion. When an option is provided the corresponding criterion is applied and paths which do not respect the criterion are rejected.</label>
+			<param name="filter" type="bool" gui-hidden="true">true</param>
+			<param name="filter_tolerance" type="float" min="0.000" max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Tolerance used to determined if a line is closed or not (default 0.050 mm)">0.050</param>   
+			<param name="filter_closed" type="bool" gui-text="Keep closed lines">false</param>
+			<param name="filter_not_closed" type="bool" gui-text="Keep open lines">false</param>
+			<param name="filter_min_length_enabled" type="bool" gui-text="filter by min length">false</param>
+			<param name="filter_min_length" type="float" min="0.000" max="99999.000" precision="3" gui-text="minimum length (mm)" gui-description="Keep lines whose length isn't shorter than value">0.000</param>
+			<param name="filter_max_length_enabled" type="bool" gui-text="filter by max length">false</param>
+			<param name="filter_max_length" type="float" min="0.000" max="99999.000" precision="3" gui-text="maximum length (mm)" gui-description="Keep lines whose length isn't greater than value">0.000</param>
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_freemode.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_freemode.inx
index 57f45ce2..faa51475 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_freemode.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_freemode.inx
@@ -20,18 +20,27 @@
 		    <param name="freemode_show_cmd" type="bool" gui-text="Show command" gui-description="Print the full command chain. Helpful for debugging.">false</param>	 		 	
 		</page>
 		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
 			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
 			   <option value="layers">Multilayer/document (all layers/complete document)</option>
 			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
 			</param>
-		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
-		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
-		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
 		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
-		 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
-		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
 			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
 			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
 			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_linemerge.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_linemerge.inx
index 5c16670b..aee61b6c 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_linemerge.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_linemerge.inx
@@ -2,32 +2,49 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Line Merging</name>
     <id>fablabchemnitz.de.vpype_linemerging</id>
-	<label appearance="header">Line Merging</label>
-	<label>Merge lines whose endings and starts overlap or are very close.</label>
- 	<param name="linemerge" type="bool" gui-hidden="true">true</param>
-	<param name="linemerge_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Maximum distance between two line endings that should be merged (default 0.500 mm)">0.500</param>           
-	<param name="linemerge_no_flip" type="bool" gui-text="no flip" gui-description="Disable reversing stroke direction for merging">false</param>
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>Merge lines whose endings and starts overlap or are very close.</label>
+			<param name="linemerge" type="bool" gui-hidden="true">true</param>
+			<param name="linemerge_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Maximum distance between two line endings that should be merged (default 0.500 mm)">0.500</param>           
+			<param name="linemerge_no_flip" type="bool" gui-text="no flip" gui-description="Disable reversing stroke direction for merging">false</param>
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_linesimplify.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_linesimplify.inx
deleted file mode 100644
index 3ec75e90..00000000
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_linesimplify.inx
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
-    <name>Line Simplification</name>
-    <id>fablabchemnitz.de.vpype_linesimplification</id>
-	<label appearance="header">Line Simplification</label>
-	<label>Reduce the number of segments in the geometries.</label>
- 	<param name="linesimplify" type="bool" gui-hidden="true">true</param>	
-	<param name="linesimplify_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="The resulting geometries' points will be at a maximum distance from the original controlled by the (default 0.05 mm)">0.050</param>   
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
-	</param>    
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
-    <effect needs-live-preview="true">
-		<effects-menu>
-         <submenu name="FabLab Chemnitz">
-	         <submenu name="vpype Tools"/>
-		</submenu>
-		</effects-menu>
-    </effect>
-    <script>
-        <command location="inx" interpreter="python">vpypetools.py</command>
-    </script>
-</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_linesort.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_linesort.inx
index bbf91434..449509c4 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_linesort.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_linesort.inx
@@ -2,31 +2,48 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Line Sorting</name>
     <id>fablabchemnitz.de.vpype_linesorting</id>
-    <label appearance="header">Line Sorting</label>
-    <label>Sort lines to minimize travel distances.</label>
- 	<param name="linesort" type="bool" gui-hidden="true">true</param>
-    <param name="linesort_no_flip" type="bool" gui-text="Disable flipping" gui-description="Disable reversing stroke direction for optimization '--no-flip'">false</param>
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+		<label>Sort lines to minimize travel distances.</label>
+		<param name="linesort" type="bool" gui-hidden="true">true</param>
+		<param name="linesort_no_flip" type="bool" gui-text="Disable flipping" gui-description="Disable reversing stroke direction for optimization '--no-flip'">false</param>
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_multipass.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_multipass.inx
index 8d7242cf..843abb4f 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_multipass.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_multipass.inx
@@ -2,31 +2,48 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Multipass</name>
     <id>fablabchemnitz.de.vpype_multipass</id>
-	<label appearance="header">Multipass</label>
-	<label>Add multiple passes to each line. Each line is extended with a mirrored copy of itself, optionally multiple times. This is useful for pens that need several passes to ensure a good quality.</label>
- 	<param name="multipass" type="bool" gui-hidden="true">true</param>	
-	<param name="multipass_count" type="int" min="2" max="9999" gui-text="count" gui-description="How many passes for each line (default 2)">2</param>
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>Add multiple passes to each line. Each line is extended with a mirrored copy of itself, optionally multiple times. This is useful for pens that need several passes to ensure a good quality.</label>
+			<param name="multipass" type="bool" gui-hidden="true">true</param>	
+			<param name="multipass_count" type="int" min="2" max="9999" gui-text="count" gui-description="How many passes for each line (default 2)">2</param>
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_occult.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_occult.inx
index d0cfd0d8..4abd45d7 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_occult.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_occult.inx
@@ -2,31 +2,48 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Occult Plugin (HLR)</name>
     <id>fablabchemnitz.de.vpype_plugin_occult</id>
-	<label appearance="header">Occult Plugin (Concealed / Hidden Line Removal)</label>
-	<label>This plugin command removes duplicated lines. It acts like a trimmer to receive a clean set of visible paths only. You need to install occult plugin for vpype and a working pygeos library.</label>
- 	<param name="plugin_occult" type="bool" gui-hidden="true">true</param>
-	<param name="plugin_occult_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Max distance between start and end point to consider a path closed (default 0.01 mm)">0.01</param>  
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+		<label>This plugin command removes duplicated lines. It acts like a trimmer to receive a clean set of visible paths only. You need to install occult plugin for vpype. See vpypetools documentation.</label>
+		<param name="plugin_occult" type="bool" gui-hidden="true">true</param>
+		<param name="plugin_occult_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Max distance between start and end point to consider a path closed (default 0.01 mm)">0.01</param>  
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_relooping.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_relooping.inx
index 1859b448..2f0cc957 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_relooping.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_relooping.inx
@@ -2,31 +2,48 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Relooping</name>
     <id>fablabchemnitz.de.vpype_relooping</id>
-	<label appearance="header">Relooping</label>
-	<label>Randomize the seam location of closed paths.</label>
- 	<param name="reloop" type="bool" gui-hidden="true">true</param>	
-	<param name="reloop_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Controls how close the path beginning and end must be to consider it closed (default 0.500 mm)">0.500</param>   
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>Randomize the seam location of closed paths.</label>
+			<param name="reloop" type="bool" gui-hidden="true">true</param>	
+			<param name="reloop_tolerance" type="float" min="0.000"  max="99999.000" precision="3" gui-text="tolerance (mm)" gui-description="Controls how close the path beginning and end must be to consider it closed (default 0.500 mm)">0.500</param>   
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_splitall.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_splitall.inx
index b3d1c359..31d7c7a3 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_splitall.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_splitall.inx
@@ -2,30 +2,47 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Split All (Break Paths)</name>
     <id>fablabchemnitz.de.vpype_splitall</id>
-	<label appearance="header">Split All (Break Paths)</label>
-	<label>Split all paths into their constituent segments. This command may be used together with linemerge for cases such as densely-connected meshes where the latter cannot optimize well enough by itself. This command will filter out segments with identical end-points. Note that since some paths (especially curved ones) can be made of a large number of segments, this command may significantly increase the processing time of the pipeline.</label>
- 	<param name="splitall" type="bool" gui-hidden="true">true</param>	
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>Split all paths into their constituent segments. This command may be used together with linemerge for cases such as densely-connected meshes where the latter cannot optimize well enough by itself. This command will filter out segments with identical end-points. Note that since some paths (especially curved ones) can be made of a large number of segments, this command may significantly increase the processing time of the pipeline.</label>
+			<param name="splitall" type="bool" gui-hidden="true">true</param>	
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-	<param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines. Automatically enabled if 'Multilayer/document'">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">
diff --git a/extensions/fablabchemnitz/vpypetools/vpypetools_trim.inx b/extensions/fablabchemnitz/vpypetools/vpypetools_trim.inx
index 0a7f968b..ccf452cb 100644
--- a/extensions/fablabchemnitz/vpypetools/vpypetools_trim.inx
+++ b/extensions/fablabchemnitz/vpypetools/vpypetools_trim.inx
@@ -2,32 +2,49 @@
 <inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
     <name>Trimming</name>
     <id>fablabchemnitz.de.vpype_trimming</id>
-	<label appearance="header">Trimming</label>
-	<label>This command trims the geometries by the provided X and Y margins with respect to the current bounding box.</label>
- 	<param name="trim" type="bool" gui-hidden="true">true</param>	
-	<param name="trim_x_margin" type="float" min="0.000"  max="99999.000" precision="3" gui-text="trim margin - x direction (mm)">0.000</param>
-	<param name="trim_y_margin" type="float" min="0.000"  max="99999.000" precision="3" gui-text="trim margin - y direction (mm)">0.000</param>
-	<spacer/>
-    <label appearance="header">General Settings</label>
-	<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
-	   <option value="layers">Multilayer/document (all layers/complete document)</option>
-	   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+	<param name="tab" type="notebook">
+		<page name="freemode" gui-text="Free Mode Entries">
+			<label>This command trims the geometries by the provided X and Y margins with respect to the current bounding box.</label>
+			<param name="trim" type="bool" gui-hidden="true">true</param>	
+			<param name="trim_x_margin" type="float" min="0.000"  max="99999.000" precision="3" gui-text="Trim margin - x direction (mm)">0.000</param>
+			<param name="trim_y_margin" type="float" min="0.000"  max="99999.000" precision="3" gui-text="Trim margin - y direction (mm)">0.000</param>
+		</page>
+		<page name="general_settings" gui-text="General Settings">
+			<label appearance="header">Preprocessing</label>
+		    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting. Disabled for 'Multilayer/document'">false</param>
+			<spacer/>
+			<label appearance="header">Input (InkScape to vpype)</label>
+			<param name="input_handling" type="optiongroup" appearance="radio" gui-text="Input/Layer handling">
+			   <option value="layers">Multilayer/document (all layers/complete document)</option>
+			   <option value="paths">Singlelayer/paths (a single layer/paths in selection or all paths in document)</option>
+			</param>
+		    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Convert bezier curves to polylines. Automatically enabled if 'Multilayer/document' (quantization parameter)">true</param>	
+			<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness (tolerance)" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get. This value is also used by option 'simplify'">0.100</param>
+			<param name="simplify" type="bool" gui-text="Simplify geometry" gui-description="Reduces significantly the number of segments used to approximate the curve while still guaranteeing an accurate conversion, but may increase the execution time. Does not work for 'Singlelayer/paths'">false</param>
+			<param name="parallel" type="bool" gui-text="Parallelize Simplify geometry" gui-description="Enables multiprocessing for the SVG conversion. This is recommended ONLY when using 'Simplify geometry' on large SVG files with many curved elements. Does not work for 'Singlelayer/paths'">false</param>			
+			<spacer/>
+			<label appearance="header">Validation (vpype pipeline)</label>
+		 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a separate window showing the finished SVG data. If enabled output is not applied to InkScape canvas (only for preview)!">false</param>
+		 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion. Helps to find out length savings.">false</param>
+			<spacer/>
+			<label appearance="header">Output (vpype to InkScape)</label>
+		 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
+		 	<param name="keep_objects" type="bool" gui-text="Keep original objects" gui-description="If false, original (selected) objects will be removed">false</param>
+		 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects. Warning: increases import time significantly.">true</param>
+			<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
+			<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
+			<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
+		</page>
+		<page name="about" gui-text="About">
+			<label appearance="header">vpypetools documentation</label>
+		    <label appearance="url">https://y.stadtfabrikanten.org/vpypetools</label>
+			<label appearance="header">CLI reference (command list)</label>
+		    <label appearance="url">https://vpype.readthedocs.io/en/stable/reference.html</label>
+			<separator/>		
+			<label appearance="url">https://fablabchemnitz.de</label>
+			<label>License: GNU GPL v3</label>
+		</page>
 	</param>
-    <param name="flattenbezier" type="bool" gui-text="Quantization (flatten bezier curves to polylines)" gui-description="Converts bezier curves to polylines.">true</param>	
-	<param name="flatness" type="float" min="0.001" max="99999.000" precision="3" gui-text="flatness" gui-description="Minimum flatness = 0.001. The smaller the value the more fine segments you will get.">0.100</param>	
-    <param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running vpype. Helps avoiding geometry shifting">false</param>
- 	<param name="output_show" type="bool" gui-text="Preview only (debug output)" gui-description="This will open a new matplotlib window showing modified SVG data. If enabled output is not applied to InkScape canvas!">false</param>
- 	<param name="output_stats" type="bool" gui-text="Show conversion statistics" gui-description="Show output statistics before/after conversion">false</param>
- 	<param name="output_trajectories" type="bool" gui-text="Import travel trajectories" gui-description="Add paths for the travel trajectories">false</param>
- 	<param name="keep_selection" type="bool" gui-text="Keep selected paths" gui-description="If false, selected paths (original objects) will be removed">false</param>
- 	<param name="strokes_to_paths" type="bool" gui-text="Auto-convert low-level strokes to paths" gui-description="Recommended option. Performs 'Path' > 'Stroke to Path' (CTRL + ALT + C) to convert vpype converted lines back to regular path objects">true</param>
-	<param name="use_style_of_first_element" type="bool" gui-text="Use style of first element in layer" gui-description="If enabled the first element in selection is scanned and we apply it's style to all imported vpype lines (but not for trajectories). Does not work for 'Multilayer/document'">true</param>	
-	<param name="lines_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of tooling lines (px)" gui-description="Gets overwritten if 'Use style of first selected element' is enabled">1.000</param>	
-	<param name="trajectories_stroke_width" type="float" min="0.001" max="99999.000" precision="3" gui-text="Stroke width of trajectory lines (px)">1.000</param>
-    <label appearance="header">About</label>
-    <separator/>
-    <label appearance="url">https://fablabchemnitz.de</label>
-    <label>License: GNU GPL v3</label>
     <effect needs-live-preview="true">
 		<effects-menu>
          <submenu name="FabLab Chemnitz">