Starting at the top hinge, match up one of the lines the bracket with the level line drawn in step one. Screw door to the wall using the drywall screws provided. Work your way down the hinge side of the door, making sure to use the same line for each of the 3 hinge brackets. Next, check the clearance between the frame and the door on the top and knob side. Take care to make sure they are equal. Starting at the top again, continue working your way down the door. Keep the clearance between the frame and door equal, as you screw the door to the wall with the drywall screws.