Dual XNAV3500P - Manual (Page 28)

XNAV3500P PORTABLE GPS NAVIGATION SYSTEM
Additional Functions
In map view mode, tap the icon to display the ADDITIONAL FUNCTIONS screen.
The availability of some functions depends on whether you are navigating or not.
The ADDITIONAL FUNCTIONS screen appears:
Tap the Day icon to adjust the brightness of the screen to daylight conditions.
Tap the Night icon to adjust the brightness of the screen to night conditions.
Tap the Speaker Mute icon to mute the audio.
Tap the Speaker icon again to resume audio.
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