The keyboard shortcut (Command-3) for giving focus to 3CX is currently hardcoded into the app. This is system-wide, meaning that other programs which use that keyboard command lose that functionality. I can't think of any other program which steals a keyboard command at the system level without the ability for the user to re-assign. Not even Apple does this, and they wrote the OS. It can't be difficult to add this option. Please consider it. Thank you.