<!--<param name="settings_what" type="description" xml:space="preserve">This exponential-scale extension distorts objects along the x-axis (and/or y-axis). The bounding box remains unchanged. Inner points move leftwards (upwards) when the exponent is > 1 and rightwards (downwards) when it is < 1. This can be used to create a logarithmic scale.</param>
<param name="padding_what" type="description" xml:space="preserve">Apply padding to soften the effect. Without padding the exponential curve runs from 0 to 1. With e.g. 100% padding it runs from 0.5 to 1.</param>