Garmin 378 Manuale Proprietario

Backlight Timeout—sets the backlight to stay on when it is turned 

on, or to time out after a selected period of time has elapsed when 

using the battery. The backlight stays on regardless of this setting 

when external power is used. 
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. 

Use the Sound tab to customize the sounds made by the unit. 

1.  Press 

MENU twice to open the Main Menu. 

2.  Use the 

ROCKER to highlight the 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.

M

AIN

 M

ENU

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S

OUND

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AB