Symbol PDT 3200 Quick Reference page 11

9
Using the Backlight
When using the PDT 3200 in dim light, you can turn on the
backlight to see the display better. Press the lamp key (the key
with the light bulb icon) below the LCD display to turn the
backlight on or off. To save battery power, the backlight shuts off
automatically if you do not press a key within a certain amount
of time. The backlight turns back on when you press any keypad
key.
The default time-out period for the backlight shut-off feature is
15 seconds. See the PDT 3200 Product Reference Guide for
information on changing the default time-out period.