- Sew the 5/8" side seam down to the top of the vent.
- Press the seam open, continuing down to press open the vent turn-back along the 5/8" line.
- Flip the shirt so that you can fold a seam allowance to the wrong side to meet the stitching line and press. Do the same with the other seam allowance. Press hard.
- Edgestitch in place.