This might be a hardware isuue but am unsure. When working with more than one instance of ArchiCAD and switching between them, or when closing one instance down, the active windows in the earlier instance go blank, or more accurately, lime yellow. Zooming in and out with the scroll wheel displays correctly but when scroll or zoom is stopped the screen goes blank again. I typically have to re-start ArchiCAD to correct.
Video card is NVIDIA GeForce FX 5200
David Bearss
Archicad 18/Windows 11
Alienware 17 R5
i7 2.4 GHz / 16 GB ram