Furuno GP-7000F - Manual (Page 14)

1. OPERATIONAL OVERVIEW
1-4
1.4 Adjusting Brilliance and Contrast
You can adjust display brilliance and contrast as shown below.
1. Press the [POWER/BRILL] key momentarily.
The BACKLIGHT window appears.
BACKLIGHT
ENTER TO SET
Backlight window
2. Rotate the [ENTER] knob to adjust.
Rotate clockwise to raise the setting or counterclockwise to decrease it.
To escape from this window without adjusting, press the [CLEAR] or
[POWER/BRILL] key, or wait three seconds to let the equipment close it
automatically.
3. Press the [ENTER] key to close the window.