hold the trigger and turn the marker on.
The LED will now cycle through a rainbow of colors and stop on purple.
Pull and hold the trigger until the LED starts to flash
When the LED stops flashing, quickly tap the trigger 1 time.
The LED will now flash 1 time, and then flash through the rainbow of colors, and stop on purple, indicating the new value has been set.
7. To exit programming mode, shut the marker off.
if you want to reset to factory settings in programming mode hold the trigger down for 10 seconds.
copied from virtues web page.