Adjusting Volume
Choose Audio Setting from the Setup screen. Tap +/- to adjust volume. When
you're finished, tap the OK button.
Screen options
Choose Screen Setting from the Setup screen.
Tap +/- to adjust backlight.
Tap the right/left arrows to adjust idle time (the amount of time the GPS will wait
before going to sleep when not used).
Press "Calibrate" to calibrate the screen, then follow the onscreen directions.
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