Hi guys,
I have the same problem, i have holes in my roof (for patios) and i need to see what's underneath. I understood the first step but not the part when you say "On the upper story, set the Floor Plan Cut Plane to extend below the Current Story enough to cut through the wall on the story below"... I'm new to Archicad (2days) and i don't know how to do that.
Here's a screencap of my roof plan... the parts in blue are the holes, and what's red comes from the reference plan and should be seen (except the complicated bit near the "x" mark)... Its mainly beams and columns, but there's also plants (which i don't know hot to put), and some cover fills of the floor under. Can you help me?
PS : By the way is there a way to hide the trace reference.