Thanks for these, the issue is that the slab will then still cover the zone fill - as per the top right of the screen shot.
I can't bring the zone to the top because it will cover the stair, the stair can't be transparent because it's hiding elements below. The slab can't have a fill if the zone is below. It just seems like a catch 22.
I'm interested how others use zone colours, do people ignore that the objects are white over the zone, do they not use the colour? Am I over thinking this?
ArchiCAD 26 Solo - Mac