Its really very simple.
Open the grips up, Flip the 2 dip switch up (so both are up top)
Turn the marker on, pull the trigger till the light is blue, Hold the trigger in till it flash's, after it has finished flashing pull the trigger 3 times, wait for it to flash back at you three times. It's now saved that setting, simply flip dip switch 2 back to down (off) and turn the marker off, then your done.
-james