If you are doing a walkback, and your group drifts to the left, move the rest to the right, and vice versa, if you are trying to get Fixed BH's to match POI with FP's, then do the same, move the rest to the direction you want the BH group to go. If their shooting to the right of your FP group, move the rest to the LEFT to make the BH's go left, if their shooting low, raise the rest (or you can lower your nockpoint), shooting high, lower the rest or raise the nockpoint. It's much easier with a good MICRO-Adjust rest, bit it's not impossible with other rests, just takes a little more "guess-work," so to speak. BE PATIENT, and only move the rest TINY amounts!!!!

Good Luck!!!