@Lindy DisplayPort cables are notoriously difficult to plug in fully, requiring a lot of force to finally snap into place. Often they look fully in when they are not.
@jurban @Kalos @stueytheround Thank you for responding.
The PIP setting is for Picture in Picture, so that's what you need to edit.
If your navigation buttons are not working, you may have a faulty monitor.
@stueytheround Me too, Stuey. It was a pain in the *ss. @jurban @Kalos