Strange.
Changing to Axonometric shouldn't make elements disappear.
They may not be in view but fit to window will fix that.
If you 'select all' (CMD+A on mac?) does anything select?
Does it make any difference if you change from the OpenGL engine to the Internal (Vectorial) engine?
If you select a single wall or column and view just that in 3D do you have the same problem?
Does this happen in all files or just this one?
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