Set a layout group org.inkscape.web.slicer.create_group webslicer_effect.py Pixel (fixed) Percent (relative to parent size) Undefined (relative to non-floating content size) Pixel (fixed) Percent (relative to parent size) Undefined (relative to non-floating content size) Layout Group is only about to help a better code generation (if you need it). To use this, you must to select some "Slicer rectangles" first. all