To continue policy of "crisp" icons in ArchiCAD 20 it would be nice to add SVG files (vector illustration) support in GDL user interface. As additional super-wish - to have parametric drawings inside of GDL user-interface, for example window scheme that changes it's look/proportion according to changed parameters. I guess it can be set of new commands like UI_LINE2, UI_ARC2, UI_CIRCLE2 and similar.