Filter Elements in 3D (CTRL+ALT+A) or (VIEW menu > Elements in 3D > Filter Elements in 3D)
You can turn the doors and windows off and they will show just as openings.
This setting will save with your views so you can have one 3D view with the windows/doors showing and another 3D view with them not.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11