You can tell a lot about how correct a horse's frame by the topline muscles in the neck for they tell the story. See the area of bulging muscle at the top of the neck behind the poll in the top photo? Horse is in a false frame being pulled together from front to back. The horse below is in a correct and humane frame, using his neck muscles properly. Lift, give and allow with your hands. Although the hand in the lower photo are still a bit too heavy for my taste.