Samsung SGH-T669 User Manual page 24

Backlight
A backlight illuminates the internal display and the keypad. When you press any key, the backlight turns on.
Backlight turns off when no keys are pressed or pressed within a given period of time, depending on the Backlight
menu setting. The display turns off after one minute to conserve battery power.
To specify the length of time the backlight is active, access the Backlight menu:
From the Home screen, press
1.
Touch Backlight time.
2.
Select the duration 8 seconds, 15 seconds, 30 seconds, 1 minute, 3 minutes, or 10 minutes.
3.
Touch Save to confirm your selection.
4.
Brightness
After you set the backlight duration, set the brightness levels.
From the Home screen, press
1.
Touch Brightness.
2.
Slide the Level bar from 1-5 to select the brightness level.
3.
Touch Save to confirm your selection.
4.
Display
Your phone has a display on the front of the phone which indicates when you have an incoming call or message. It
also alerts you at a specified time when an alarm was set by turning on the backlight and displaying a
corresponding icon on the screen.
The display shows the current time and date on a digital clock.
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then touch Settings
then touch Settings
Display settings.
Display settings.