Select Menu > Settings > System > Display.

Auto Brightness

Automatically adjusts the backlight brightness based on the ambient light.

Brightness

Sets the backlight brightness.

Backlight Timeout

Sets the length of time before the backlight turns off.

Color Mode

Sets the device to display day or night colors. You can select the Auto option to allow the device to set day or night colors automatically based on the time of day.

Screen Capture

Allows you to save the image of the device screen.