Do you mean the walking function that goes forward and reverse? If so, just hold down either the two "silver" buttons next to the red on/off button for a few seconds. That will bring up an avatar of a person walking. Once in that mode, the bike will either move slowly forward or backwards, depending on which silver button you hold down. To get out of the mode, just quickly tap (don't hold down) one of the silver buttons (I think it might be the lower one, not sure). Works great for loading bike on truck, and doing a multipoint turn to change directions on a trail. Nice feature.