Prep Your Zip
If the zip is overly curled, unzip and press along the fabric lightly so the teeth lay flat. Now to attach the zipper to the fabric. With the zip opened up and facing down on the right side of the fabric, pin in place lining the teeth on the seam line you marker earlier.
If the fabric is slippery or thicker then you may need to baste, pinning should be sufficient for most projects though.
To stitch the zipper position the zip teeth under the presser foot in the relevant groove and stitch until the presser foot reaches the zipper stop. Backstitch to lock in and remove.