0 nüvi 310/360/370 Owner’s ManualcustomIzInG the nüvIChanging the System SettingsTo change the system settings, on the Menu page, touch Settings > System.WAAS/eGnoS—turning on the WAAS/EGNOS setting might improve GPSaccuracy, but it consumes more battery power. For information about WAAS/EGNOS,go to www.garmin.com/aboutGPS/waas.html.Safe Mode—turn on or off the Safe Mode feature. When your vehicle is moving, SafeMode disables all unit functions that require significant operator attention and couldbecome a distraction while driving.Garmin Lock—turn on Garmin Lock™ to lock your nüvi. Enter a four-digit PIN andset a security location. Each time you turn on the nüvi, enter the four-digit PIN ordrive to the security location.touch tones—disable or enable the tone that sounds each time you touch the screen.About—display your nüvi’s software version number, unit ID number, and audioversion number. You need this information to update the system software or purchaseadditional map data.