Duke William of Normandy won the battle because was well prepared and had a good army. They prepared carefully for the battle. The Normans had knights on horseback who were skilful fighters.
A utility knife, metal ruler, and a hammer can be faster than trying to carefully saw an opening. Score the drywall a couple times till you are most of the way through, then just knock a hole with the hammer and break the drywall back at the score lines.
If not, measure the length and width of the hole. 4. If hole is too big, you may need actual drywall to repair instead of a drywall patch. 5. Cut new drywall piece to match length and width of the hole.