To swap between mirrored and extended display on macOS use the Command + F1 keyboard shortcut. This is particularly useful if you do not see the login window when multiple displays are connected to the computer and cannot access System Preferences.
To swap between mirrored and extended display on macOS use the Command + F1 keyboard shortcut. This is particularly useful if you do not see the login window when multiple displays are connected to the computer and cannot access System Preferences.