Dell 469-0052, P1911 appendix Contrast

Submenus
Energy Gauge	This meter shows the energy level being consumed by the monitor in real time. When the meter is green, it indicates the moni
	consuming low energy level. When the energy consumed increases, the meter will change to yellow and subsequently red.
Brightness/Contrast	Use this menu to activate Brightness/Contrast adjustment.

Brightness	Brightness adjusts the luminance of the backlight.
	Press the	button to increase brightness and Press the	button to decrease brightness (min 0 ~ max 100).

NOTE: Brightness control will be greyed out during "Screen dim" in PowerNap option when screen saver is activated.

Contrast	Adjust Brightness first, and then adjust Contrast only if further adjustment is necessary.
	Press the	button to increase contrast and Press 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.