Dell E2210 User Manual page 17

Input Source
VGA
DVI-D
Scan for Sources
Color Settings
Back
Use the Input Source menu to select between different video signals that may be connected to your monitor.
Select VGA input when you are using the analog (VGA) connector. Push
Select DVI-D input when you are using the Digital (DVI) connector. Push
Select Auto Select to scan for available input signals.
Use the Color Settings menu to adjust the monitor's color settings.
Press to go back to the main menu.
to select the VGA input source.
to select the DVI input source.