Select Setup > Display.

Backlight Timeout

Adjusts the length of time before the backlight turns off.

Battery Save

Saves the battery power and prolongs the battery life by turning off the screen when the backlight times out.

Appearance

Changes the appearance of the display background and selection highlight (Changing the Color Mode).

Screen Capture

Allows you to save the image on the device screen.

Review Text Size

Changes the size of the text on the screen.