Operation23UNIDEN PRO5050 AM-CB TransceiverBacklight Colours1. Press [MENU/ENTER] seven times.The Backlight setting flashes.2. Turn the Rotary Channel Selector tochange the desired colour setting betweenOr (Orange) and Gr (Green).3. Press and hold [MENU/ENTER] to save &exit from the menu mode.NOTEIf a button is not pressed within 10 seconds the Radio will automaticallyexit the Menu Mode.Backlight Brightness1. Press [MENU/ENTER] six times. TheBacklight level (LIGHT) setting flashes.2. Turn the Rotary Channel Selector tochange the setting between Off, Hi and Lo.3. Press and hold [MENU/ENTER] to save &exit from the menu mode.NOTEIf a button is not pressed within 10 seconds the Radio will automaticallyexit the Menu Mode.ANL/NB (Automatic Noise Limiter + Noise Blanker)ANL/NB will reduce the harsh background noide caused by some interference.Press ANL/NB the ANL/NB icon appears.