If you use the Cadimage Windows in ARCHICAD 20, The frame depth can be changed to 0, this will set the frame depth to match the thickness of the wall.
You may know about the Roof thickness is usually a parallel dimension related of the roof angle. However, if you want to enter the roof thickness as a vertical dimension, if the roof is a simple roof, you can open the settings and click the option to the right and assign the dimension to be
If your slab thickness field in ‘grayed out’ this means you are using a Composite Fill . If you want to change the thickness you need to change the Composite (Options > Element Attributes > Composites…) or use a non-Composite fill .