Samyung NAVIS 5100 Instruction Manual page 20

 Day/Night Mode in Plotter Display
button  [DEPTH, BRIGHT,
On the plotter screen of Plotter/Fish Finder screen, press ( )button or
ALARM/CLEAR] , press [BRIGHT] and you can set up Brightness and Transparency. Day/Night
screen can be shifted by pressing button.
( )
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