Dell U2713HM Monitor - Manual (Page 33)

Icon Menu and Submenus Description
Brightness/Contrast Use this menu to activate Brightness/Contrast adjustment.
Brightness Brightness adjusts the luminance of the backlight.
Push the button to increase brightness and push the button to decrease brightness (min 0 ~ max 100).
Contrast Adjust Brightness first, and then adjust Contrast only if further adjustment is necessary.
Push the button to increase contrast and push the button to decrease contrast (min 0 ~ max 100).
The Contrast function adjusts the degree of difference between darkness and lightness on the monitor screen.
Auto Adjust 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 Pixel Clock (Coarse) and Phase (Fine) controls under Image Settings.