To do a drywall patch for a holes in drywall up to 6″ cut a piece of drywall into a square shape that’s 2 inches larger in width and height than the area to be repaired. Score the back of the drywall with a box cutter or knife about an inch from each side. Snap off the gypsum, but leave the paper backing intact. Hold the drywall patch over the hole and trace around the gypsum square. Do not include the paper border in your transfer. Cut out the traced square with a drywall knife. Apply joint compound to the back of the paper border. Fit the drywall patch into the new hole and press the paper edges coated with joint compound into place along the outside edge of the hole. Cover the entire patch with joint compound until the lines are camouflaged, feathering the edges. This drywall patch may require two coats of compound, with dry time in between coats. Sand smooth.