Select > Global Settings > System > Sounds and Display.

Beeper

Turns on and off the tone that sounds for alarms and selections.

Backlight

Sets the backlight brightness.

Backlight Sync

Synchronizes the backlight brightness of other chartplotters and instruments in the station.

Color Mode

Sets the device to display day or night colors. You can select the Auto option to allow the device to set day or night colors automatically based on the time of day.

Startup Image

Sets the image that appears when you turn on the device.