When you create or change keyboard shortcuts you need to save the 'Shortcut Scheme' so you are not using a custom scheme.
Either redefine an existing scheme that is being used in your work environment or save it as a new scheme.
If saving as new then you need to set your current Work Environment to use this new scheme or create a whole new work environment that uses this scheme.
If you set that Work Environment as default it will be used each time you start Archicad.
If you have 2 Archicads open at the same time the changes you make in one will not affect the other (at least I don't think so until you restart) or 'Apply Scheme' to reset the changes.
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