Lift the door. Move the bottom pivot out of the bracket.
Twist the pivot. Turn it clockwise to raise the door. Turn it counterclockwise to lower the door.
Position the pivot in the bracket. Lower the door.
Loosen the screw in the top bracket.
Move the bracket along the track. Stop when the door is level. The door should have 1/4-inch clearance between it and the header.
Tighten the screw.