I have an external screen connect to my laptop.
In Settings/Displays, the primary screen is set as the built-in display.
When boot Zorin OS 16, the login screen always shows on the external screen, not the primary screen.
But if I disconnect the external screen, the login screen, of course, shows on the built-in screen.
How to let the login screen show on the built-in display when an external screen connects to my laptop ?