rutt

I just purchased a new Garmin Vista HCX gps.I'm new to the gps game.I'm having trouble figuring out how to work the trackback feature.I've got the waypoint part figured out.I'm going to be using it for hunting and really want to be able to follow my exact trail back to my starting point(bread crumb trail).The manual sucks at explaining the trackback feature,and I cannot figure it out.Any help would be appreciated.Thanks.