DRZ speedometer/ odometer

Everytime I go ride I look at all the buttons on my drz400 speedometer.

I also push the wrong one everytime I am trying to adjust it.  Last time I had my accumeulated miles rolling off the speedometer instead on adding to the total mileage.

Does anyone have the real instructions on how to operate the DRZ speedometer and just what all those buttons do ??

Thanks    wurty