Contrast is highlighted on the Screen menu (left). The Contrast Adjust window (center). Reverse Video highlighted on Screen menu (right).

The easiest way to change the look of the display is to utilize the Reverse Video command, commonly used for nighttime viewing.

To select Reverse Video:

1.From the screen menu, highlight REVERSE VIDEO and press ENTER. You'll notice the dark and light colors have been swapped for one another. The white text, which was on top of a dark background, now has been switched to dark text on top of a white background. If more than one gauge in on the bus, it will automatically adjust the other gauge to the same setting.

2.To toggle back to the previous setting, return to the Screen menu, select REVERSE VIDEO and press ENTER.

3.Press EXITEXIT to return to the main display.

Audio Setup highlighted on the basic menu (left). Audio Setup menu (center) with Key Sounds menu (right).

Audio Setup

To modify audio settings:

1.Press MENU, highlight AUDIO SETUP, then press ENTER. A menu will appear with two options: Key Sounds and Alarm Sound.

Adjusting Key Sounds:

2.Select KEY SOUNDS and press ENTER.

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Lowrance electronic LMF-400 manual Audio Setup, Press Exitexit to return to the main display