how to use the reverse camera settings on kenwoods

Because removing or dislodging the battery, the settings on Hu or Dvd back to resetting so the camera back off so, to reactivate the live setting on HU / DVD. How to set it! Click HOME on the LCD Panel then at the bottom we click SETUP then on the choice beside we click INPUT then click Rear Camera and after that turn on Rear Camera Interuption! Done