Walls not at high like the ceiling

[Bummibaer]

I have an open kitchen with walls 80cm high.
But in the 3D-View the ceiling is drawn down to this walls.
Is there a switch to divide the wall from ceiling? Or any
other way to do that.
Thanks

[Puybaret]

Please see my suggestions in this thread.
Another easy way is to create an additional empty level because the system that computes the height of ceiling corners according to the height of the walls isn’t used at lower levels. The ceiling of lower levels is always at the height set in the level modification dialog box.