Samsung SGH-T739TSATMB - Manual (Page 24)

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Backlight
A backlight illuminates the display and the keypad. When you press any key, the
backlight comes on. It goes off when no keys are pressed within a given period of
time, depending on the setting within the Backlight menu. The display turns off
after one minute to conserve battery power.
The On setting is how long the keypad backlight is on. The Dim option is how much
longer after the keypad backlight goes off that the display remains lit.
To specify the length of time the backlight is active, access the Backlight menu:
1. In Idle mode, press the Menu soft key to access the Menu mode.
2. Using the Navigation keys, scroll to the Settings icon. Press the Select
soft key or the key to enter the menu.
3. Highlight the Display settings option and press the Select soft key or
the key.
4. Highlight the Backlight option and press the Select soft key or the
key.
5. Highlight the On option. Use the Left or Right Navigation key to select the
time the backlight is on. You may choose between 15 sec, 30 sec, 1 min,
3 min, or 10 min.
6. Press the Down key to take you to the Dim option. Use the Left or Right
Navigation key to select the time the Dimming mode is on. You may choose
between Off, 15 sec, 30 sec, 1min, 3 min, or 10 min.
7. Press the Save soft key to retain your new settings.