Place the molding in the miter saw upside down.
Cut the crown molding at a 45-degree angle.
Remove the piece of crown molding. Set the second piece in the miter saw and cut it at a 45-degree in the opposite direction.
Set the miter saw at a 45-degree angle to the left.
Cut the first piece of crown molding.
Rotate the miter saw at a 45-degree angle to the right.
Cut the second piece of crown molding, known as the mate.
Attach the first piece of molding to the wall. Butt one end into the inside corner.
Hold the second piece of molding against the first. Trace the outline with the pencil.
Use the coping saw to cut out the design to match against the first piece of crown molding on the wall.