Dell G2210 User Manual page 18

Contrast
Exit Menu
AUTO
ADJUST
INPUT
SOURCE
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Adjust Brightness first, and then adjust Contrast only if further adjustment is necessary.
Press the button to increase contrast and Press the
The Contrast function adjusts the degree of difference between darkness and lightness on the monitor screen.
Press to exit the OSD main menu.
Even though your computer recognizes your monitor on startup, the Auto Adjustment function optimizes the display settings for use with your particular setup
Auto Adjustment allows the monitor to self-adjust to the incoming video signal. After using Auto Adjustment, you can further tune your monitor by using the Pi
Clock and Phase controls under Displays Settings.The following dialog appears on a black screen as the monitor automatically adjusts to the current input:
NOTE: In most cases, Auto Adjust produces the best image for your configuration.
NOTE: AUTO ADJUST option is only available when you are using the analog (VGA) connector.
Use the INPUT SOURCE menu to select between different video signals that may be connected to your monitor.
button to decrease contrast (min 0 ~ max 100).