Backlighting on the D623 or D625 keypad, used on D4412 and D6412 panel types is controlled by using Command 49.
- Press [CMD] + [49].
- Hold the star key and tap the 3 key to make the display brighter.
- Hold the star key and tap the 6 key to make the display dimmer.
- Press the Command key again to resume normal operation.
