Brightness of backlight can be adjusted through 10 levels.
To set the backlight:
1- Press Menu to enter into menu setting.
2- Repeatedly Press Menu to switch to DISPLAY menu.
3- Use the Up / Down Arrow to select Backlight option.
4- Press Ent to enter into setting.
5- Use the Up / Down Arrow to change the value.
6- Press Ent to confirm and exit the setting.
10. Contrast
Contrast enables to get the most suitable display when op-
erating the unit.
To set the Contrast:
1- Press Menu to enter into menu setting.
2- Repeatedly Press Menu to switch to DISPLAY menu.
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Echofish 600 – Installation & Operation manual