To reduce the angle, you’ll turn it to the left hand side (anticlockwise) and then only a smaller portion of your garden, farm, or plantation is sprayed. Then take a flat head screw driver and turn the big screw the right hand side (clockwise) so as to make the angle bigger you’ll notice that as you turn it to the right, the angle of spray increases further.That right position is the set/lock position it is the fixed position from where sprinkling starts from which the left side is the adjusted position. To adjust the head rotation, turn the inner mechanism to the left completely and then turn it back to the right.What Are The Steps To Take While Adjusting The Head Rotation? An arrow: This lines with the nozzle and gives the location of spray.