diff --git a/DisplayMachine.pde b/DisplayMachine.pde
index 3c39368..7ec438a 100644
--- a/DisplayMachine.pde
+++ b/DisplayMachine.pde
@@ -702,6 +702,24 @@ class DisplayMachine extends Machine
     }
   }
 
+  
+  int pixel_maxDensity(float penSize, float rowSizeInMM) 
+  {
+    float numberOfSegments = rowSizeInMM / penSize;
+
+    int maxDens = 1;
+    
+    if (numberOfSegments >= 2.0) {
+      maxDens = int(numberOfSegments);
+    }
+  
+    if (maxDens <= 1) {
+      maxDens = 1;
+    }  
+    
+    return maxDens;
+  }
+
   void drawExtractedPixelDensities()
   {
 
@@ -709,20 +727,36 @@ class DisplayMachine extends Machine
     pixelSize = (pixelSize < 1.0) ? 1.0 : pixelSize;
 
     pixelSize = pixelSize * getPixelScalingOverGridSize();
+    
+    float rowSizeInMM = inMM(getGridSize()) * getPixelScalingOverGridSize();
+    
+    int posterizeLevels = 255;
+    
+    if (previewPixelDensityRange) {
+      posterizeLevels = pixel_maxDensity(currentPenWidth, rowSizeInMM);
+    }
+    else {
+      posterizeLevels = densityPreviewPosterize;
+    }
 
     if (getExtractedPixels() != null)
     {
       for (PVector cartesianPos : getExtractedPixels())
       {
-        if ((cartesianPos.z <= pixelExtractBrightThreshold) && (cartesianPos.z >= pixelExtractDarkThreshold))
+        if ((cartesianPos.z <= pixelExtractBrightThreshold) && 
+            (cartesianPos.z >= pixelExtractDarkThreshold))
         {
           // scale em, danno.
           PVector scaledPos = scaleToScreen(cartesianPos);
           noStroke();
+          if ((scaledPos.x <= 0) || (scaledPos.x > displayWidth) ||
+              (scaledPos.y <= 0) || (scaledPos.y > displayHeight)) {
+              continue;
+            }  
           
           // Posterize the density value
-          int reduced = int(map(cartesianPos.z, 1, 255, 1, densityPreviewPosterize)+0.5);
-          int brightness = int(map(reduced, 1, densityPreviewPosterize, 1, 255));
+          int reduced = int(map(cartesianPos.z, 1, 255, 1, posterizeLevels)+0.5);
+          int brightness = int(map(reduced, 1, posterizeLevels, 1, 255));
           
           fill(brightness);
           switch (getDensityPreviewStyle())
@@ -732,7 +766,7 @@ class DisplayMachine extends Machine
               break;
             case DENSITY_PREVIEW_ROUND_SIZE:
               fill(0);
-              previewRoundPixel(scaledPos, map(brightness, 1, densityPreviewPosterize, pixelSize, 1));
+              previewRoundPixel(scaledPos, map(brightness, 1, posterizeLevels, pixelSize, 1));
               break;
             case DENSITY_PREVIEW_DIAMOND:
               previewDiamondPixel(scaledPos, pixelSize, pixelSize, brightness);
@@ -741,7 +775,7 @@ class DisplayMachine extends Machine
               previewNativePixel(scaledPos, pixelSize, brightness);
               break; 
             case DENSITY_PREVIEW_NATIVE_SIZE:
-              previewNativePixel(scaledPos, map(brightness, 1, densityPreviewPosterize, pixelSize, 1), 50);
+              previewNativePixel(scaledPos, map(brightness, 1, posterizeLevels, pixelSize, 1), 50);
               break; 
             case DENSITY_PREVIEW_NATIVE_ARC:
               previewRoundPixel(scaledPos, pixelSize*0.8);
diff --git a/controlsActions.pde b/controlsActions.pde
index de5911a..bb71a5a 100644
--- a/controlsActions.pde
+++ b/controlsActions.pde
@@ -745,4 +745,9 @@ void numberbox_mode_changeDensityPreviewPosterize(int value) {
   densityPreviewPosterize = value;
 }
 
+void minitoggle_mode_previewPixelDensityRange(boolean flag) {
+  previewPixelDensityRange = flag;
+  println("previewPixelDensityRange: " + previewPixelDensityRange);
+}
+
 
diff --git a/controlsSetup.pde b/controlsSetup.pde
index bac05fd..0b759f6 100644
--- a/controlsSetup.pde
+++ b/controlsSetup.pde
@@ -579,7 +579,11 @@ Map<String, Controller> initialiseToggleValues(Map<String, Controller> map)
       Toggle t = (Toggle) map.get(key);
       t.setValue((rotateWebcamImage) ? 1 : 0);
     }
-    
+    else if (MODE_PREVIEW_PIXEL_DENSITY_RANGE.equals(key))
+    {
+      Toggle t = (Toggle) map.get(key);
+      t.setValue((previewPixelDensityRange) ? 1 : 0);
+    }
   }
   return map;
 }
@@ -725,6 +729,7 @@ List<String> getControlNamesForInputPanel()
   controlNames.add(MODE_SHOW_QUEUE_PREVIEW);
   controlNames.add(MODE_SHOW_DENSITY_PREVIEW);
   controlNames.add(MODE_SHOW_GUIDES);
+  controlNames.add(MODE_PREVIEW_PIXEL_DENSITY_RANGE);
 
   
   return controlNames;
@@ -995,7 +1000,7 @@ Map<String, String> buildControlLabels()
   result.put(MODE_CYCLE_DENSITY_PREVIEW_STYLE, "Cycle preview style");
   
   result.put(MODE_CHANGE_DENSITY_PREVIEW_POSTERIZE, "Pixel posterize");
-
+  result.put(MODE_PREVIEW_PIXEL_DENSITY_RANGE, "Show density range");
   
 
   return result;
@@ -1144,6 +1149,7 @@ Set<String> buildControlNames()
   result.add(MODE_CYCLE_DENSITY_PREVIEW_STYLE);
   
   result.add(MODE_CHANGE_DENSITY_PREVIEW_POSTERIZE);
+  result.add(MODE_PREVIEW_PIXEL_DENSITY_RANGE);
   
   return result;
 }
diff --git a/polargraphcontroller.pde b/polargraphcontroller.pde
index df7c350..a5930c0 100644
--- a/polargraphcontroller.pde
+++ b/polargraphcontroller.pde
@@ -57,15 +57,13 @@ import java.awt.BorderLayout;
 import java.lang.reflect.Method;
 
 int majorVersionNo = 2;
-int minorVersionNo = 2;
-int buildNo = 2;
+int minorVersionNo = 3;
+int buildNo = 1;
 
 String programTitle = "Polargraph Controller v" + majorVersionNo + "." + minorVersionNo + " build " + buildNo;
 ControlP5 cp5;
 Map<String, ControlP5> cp5s = new HashMap<String, ControlP5>();
 
-
-
 boolean drawbotReady = false;
 boolean drawbotConnected = false;
 
@@ -343,6 +341,7 @@ static final String MODE_ADJUST_PREVIEW_CORD_OFFSET = "numberbox_mode_previewCor
 static final String MODE_CYCLE_DENSITY_PREVIEW_STYLE = "button_mode_cycleDensityPreviewStyle";
 
 static final String MODE_CHANGE_DENSITY_PREVIEW_POSTERIZE = "numberbox_mode_changeDensityPreviewPosterize";
+static final String MODE_PREVIEW_PIXEL_DENSITY_RANGE = "minitoggle_mode_previewPixelDensityRange";
 
 
 PVector statusTextPosition = new PVector(300.0, 12.0);
@@ -390,6 +389,7 @@ static final int DENSITY_PREVIEW_NATIVE_SIZE = 5;
 static final int DEFAULT_DENSITY_PREVIEW_STYLE = DENSITY_PREVIEW_NATIVE;
 int densityPreviewStyle = DEFAULT_DENSITY_PREVIEW_STYLE;
 int densityPreviewPosterize = 255;
+boolean previewPixelDensityRange = true;
 
 static final byte COORD_MODE_NATIVE_STEPS = 0;
 static final byte COORD_MODE_NATIVE_MM = 1;
@@ -485,7 +485,7 @@ RShape vectorShape = null;
 String vectorFilename = null;
 float vectorScaling = 100;
 PVector vectorPosition = new PVector(0.0,0.0);
-int minimumVectorLineLength = 0;
+int minimumVectorLineLength = 2;
 public static final int VECTOR_FILTER_LOW_PASS = 0;