 In the half system, the handler simply remains on the side (the "half") of the horse opposite that of the judge; when the judge is looking at the left side of the horse, the handler stands on the right, and vice versa.The quarter system is a bit more complex but also more common.In the quarter system, the handler stands on the side opposite the judge when the judge is looking at the front of the horse, but when the judge moves to look at the hindquarters of the horse, the handler then moves to stand on the same side of the horse as the judge.