Dell U2412M User Manual page 20

Input Source
Auto Select
VGA
DVI-D
DisplayPort
Color Settings
Input Color Format
Use the Input Source menu to select between different video signals that may be connected to your monitor.
Push to select Auto Select, the monitor will auto detect either VGA input or DVI-D input or DislpayPort input.
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 DisplayPort input when you are using the DisplayPort (DP) connector. Push
Use Color Settings to adjust the color setting mode and color temperature.
There are different color setting sub-menus for VGA/DVI-D and Video input.
Choose the RGB option if monitor is connected to a computer or a DVD using a VGA or DVI cable. Choose the YPbPr option if monitor is
connected to a DVD by a YPbPr to VGA or YPbPr to DVI cable or if the DVD color output setting is not RGB.
to select the VGA input source.
to select the DVI input source.
to select the DisplayPort input source.