i changed it by accident one time and i think you use the same pin that changes the trip meter but you turn it or something...wish i exactly remembered but its def that trip button i believe..press it and turn it and see what changes...hahaha. sorry, hopefully someone can give ya a definitive answer!
2006 F150 FX4 - 8" lift + GONE
2014 Ram 1500 - 8.5" lift, Hemi/8 speed/3.92,= GONE
2012 F150 Platinum- Grandpa truck = CURRENT and loving it!