To secure a very long zipper into a project without it puckering or shifting:
: Apply double-sided basting tape to the zipper tape to hold it in place against the fabric before sewing. ShadyLewds_Collection_2019.zip
: Move your needle to the far right or left to sew approximately 1/8 inch away from the zipper teeth. Special Configurations To secure a very long zipper into a
If you have raw zipper tape and need to attach the pull/head to create a functional long piece: Add Zipper Pull on Raw End of Tape
To give you more specific advice, are you working on a (like a jacket) or a large gear project (like a tent or bag)? Add Zipper Pull on Raw End of Tape Tutorial
: Use a longer stitch length (such as a 6 mm straight stitch) and lower the thread tension to prevent the fabric from "shortening up" or puckering along the long run.
Identify the "top" of the zipper pull, which has two openings, and the "bottom," which has one.