On the level, 20 feet from wall, back of garage,etc. Measure from floor to center of headlamp, mark this height on wall (piece of tape). Shine light, high beam to wall. Adjust beam to hit mark. Side to side is usually O.K. but stand at back center of car and eyeball, Beams should be straight ahead. High beams only, Low beams will lower and go to right, they take care of themselves.