Step 6: Transfer the measurements and cut the wallboard
Transfer the measurements for the patch to new wallboard. Cut the wallboard by scoring firmly along the cut line on the paper face of the drywall. Then, from the back side, bend the wallboard back away from the cut and it will snap along the line. Keep the wallboard bent and, on the back side, use a utility knife to cut the paper down the length of the fold.
 To cut, score the wallboard deeply on the finished side of the wallboard.
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