For zipper insertion. Attach the Adjustable Zipper foot to the presser bar. Slide the zipper foot to adjust its position and tighten the thumb screw on the zipper foot. To sew the right side of the zipper, set the needle on the right side of the zipper foot. Lower the zipper foot at the end of the zipper so that the needle pierces the fabric next to the fold and the zipper tape.