HP S2231 21.5-inch Diagonal LCD Monitor - Manual (Page 13)

11
Default video
input
When the monitor is connected to two
active and valid video sources, select one
of them as the default video input.
The default signal input is DVI.
The change you made will be activated
after your computer is restarted.
Information
To select and display important information
about your monitor.
Restore factory
settings
The factory default settings will be restored.