Although it really shouldn't be needed, it seems like this question gets asked over and over (and over) again. Maybe a sticky at the top of the page with the answer, as I'm sure it's not the last time it gets asked.
To anyone (and no one in particular, seruiously) who hasn't read the manual (RTFM) READ IT! It not only has the answer to this question, but it also has ALOT of great info that will help you get the most out of your Factor unit(s), allowing you to tap into not obvious features, customizing your pedal to how you want it to work/act.
The pedals aren't cheap (in price or quality)- why not get the most out of them?!