You will just have to experment with amount of line out and get a feel for it. Get out on a flat in the deep you want to pull the jigs and let out line until you are bumping bottom. Mark your line at the reel with a marker, bring it back in and cast and get a feel for how much line was out. Just takes time to get used to it. My dad hated it when we started but now it is his favorite method to fish.