Shortcut Customization Dialog Box

Open Options > Work Environment > Keyboard Shortcuts.
If the selected function/command already has a shortcut assigned to it, that shortcut is displayed in the Shortcut(s) for selected command window on the right. In this image, the selected command already has a shortcut.
Click Detach selected shortcut to remove the existing shortcut. If you don’t detach it, you can still assign another shortcut; this way the function/command will have multiple shortcuts.
Click Assign.
If the key combination you entered has already been assigned to another function or command, this will be noted in the field: Currently assigned to. - In the following image, we typed F5 as a new shortcut, but this key has already been assigned.
Note: No “collision” is detected if the shortcut has been assigned to commands from two different window types.
To assign the shortcut despite the collision, click Assign anyway. This action assigns the shortcut and detaches the shortcut from the function/command to which it was previously assigned.
Click OK to close the dialog box and apply the selected shortcut scheme according to its current settings.
Only in the currently active window type: The shortcut will work only in the type of window that is currently active (i.e. the one you were working in at the time you opened the Work Environment dialog box). If you choose this option, you can assign the same shortcut to two different commands as long as the two commands are from different window types.
Note: If you have defined a shortcut to apply only in the current window type, you can henceforth edit that shortcut only by opening the Work Environment dialog box from the window-type of that shortcut.
In All window types: The shortcut will work in all windows of ARCHICAD.
Click OK to close the dialog box and apply the selected shortcut scheme according to its current settings.