Samsung SGH-T509TSATMB - Manual (Page 22)

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Section 2
Appears when Silent Mode is active.
Appears when Mute is active.
Shows the level of your battery. The more bars you see,
the more power you have remaining.
Appears when Bluetooth wireless technology is active.
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 in the Backlight menu.
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.
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.
1. In Idle mode, press the Menu soft key to access 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.