4 nüvi 610/660 Owner’s ManualBASIC OPERATIONChanging the Volume, Brightness, and Screen Lock1. Press and quickly release the Power button, or on the Menu page, touch.2. Touch or to adjust the volume and brightness. To prevent accidentalscreen taps, touch Lock. To unlock the screen, press the Power button.Resetting Your nüviIf the nüvi screen stops functioning, turn the nüvi off and on again. If this does nothelp, do the following:1. Disconnect the nüvi from external power.➌➋2. Flip up the GPS antenna.3. Press the Reset button.4. Connect the nüvi to a power source. The nüvishould automatically turn back on and operatenormally.Clearing User InformationCAUTION: This procedure deletes all information that you have entered.1. Hold your finger on the lower-right corner of the nüvi screen while you turn onthe nüvi. Keep your finger pressed until the pop-up window appears.2. Touch Yes. All factory settings are restored. Your Favorites and audiobookmarks are also deleted.