Another way you can tell if your door is hanging downward is by looking at the gap between the top of the door and the frame. If the gap gets bigger as you move away from the door hinge, the door isn’t hanging properly.
If there’s a gap only at the top or bottom of the unhinged side of your door, you’ll only need to adjust the hinge that’s level with the gap.
If you’re only adjusting one of the hinges on your door, you only need to trace the hinge 2 times on the cardboard. If your door has more than 2 hinges you’re adjusting, you’ll need to trace 2 additional outlines for each hinge.
If your door has more than 2 hinges you’re adjusting, unscrew those hinges and add the other pieces of cardboard you cut out.
If only the top or bottom of your door is pushed too close to the frame, you’ll only need to adjust the hinge that’s level with that part of the door.