Garmin Marine GPS System GPSMAP User Manual

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Twilight Adjustment—allows the unit to adjust the backlight for
optimum viewing during twilight times.
Highway Page—indicates whether the Highway Page appears in the
main page sequence.
XM Audio Page—indicates whether the XM Audio Page appears in
the main page sequence.
Compass Page—indicates whether the Compass Page appears in the
main page sequence.
Backlight Intensity—turns the backlight up or down. Press right on
the ROCKER to increase the intensity or left to decrease.
Sound Tab
Use the Sound tab to customize the sounds made by your
GPSMAP 378/478.
Main Menu—Sound Tab
Beeper—sets the beeper to chime during keypresses and alarms
(Key and Alarm) or on Alarms Only.
Audio Jack—sets the audio jack output for Headphones or
Line Out.
Attention Tone—turns on and off the attention tone that sounds
before the vocal prompts.
Voice Prompt—sets the vocal prompt to operate for Guidance and
Status, Route Guidance Only, or No Voice Prompts.
Voice Language—sets the language for vocal prompts.
Speaker Volume—sets the external speaker or headphone volume.
GPSMAP 378/478 Owner’s Manual 85
MAIn Menu > sound tAb

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