Step 1: Cut the Drywall

Measure the narrowest section between the two drywall sides. This will be the reference point for cutting the drywall (Image 1).

Note: When cutting drywall, cut a little bit wider than the measurement; it can always be shaved down.

Use a utility knife to score the paper carefully. Apply pressure by hitting in the middle of the score; the drywall should easily break in half. Finish the cut by running a knife down the paper to separate the pieces (Image 2).

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    Image 1

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    Image 2

Step 2: Secure the Drywall

Position the drywall in place and secure with screws.

With the drywall patch in place, apply an ample amount of drywall mud, making sure to fill in the creases (Image 1).

Apply drywall tape over the seams and cover with another layer of mud. Allow this layer to dry (Image 2).

When the mud has finished drying, sand down the first layer. Add another coat of mud and allow it to dry. Repeat this step as needed. Paint the patch to match the wall color.

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    Image 1

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    Image 2