How does the Win7 system adjust the screen contrast of the monitor?

How does the Win7 system adjust the screen contrast of the monitor?

Workaround One:

1, suitable for the control Panel has the video card setting option. Click the "Control Panel" option in the Start menu;

2, open the Control Panel, if it is displayed in categories, the first switch to the large icon display mode. Click on the "Nvidia Control Panel" option in the Control Panel (this option is selected according to your video card brand);

3, open Nvidia Control Panel, click on the left "show" menu under the "Adjust Desktop color settings" option;

4, in the Color Settings page, you can drag the Contrast slider to set the contrast of the screen.

Workaround 22:

1, if the control Panel does not have the video card settings option, you can use the second method. Click "Display" in the control Panel;