Adjustment to accommodate the desired angle (up to 90 degree) is done after the door is installed. Once the door is hung, simply loosen the Allen set screws and turn the door to the desired closed position. By merely tightening the Allen screws your door will self-center to the desired closing position. The door can swing 90 degree inward and 90 degree outward (adjusting angle from factory set position will reduce 90 degree swing in that direction). For doors pulling outwards only (using a clear door jamb), you can adjust the hinge to close 5 degree inside the shower area, thus having the door close snugly against the jamb.