Hello to everyone!

This is my first post here. I've been using DIALux since few years now, and have one small question. Since today, I've only worked on one PC. I've switched to another and have this problem, on new PC in terrain view I do not have invisible ceiling.

In old one, ceiling in terrain view is invisible. I've been using these function, because sometimes i build 2 or 3 cubics like that near them like separatelly buliding, and with previous view I could easily look into each other from one view.

What should I change?

I will be gratefull for any help.

Mat