I am adding this entry more for my sake than for any other reason. Because some of my grandchildren are toddler”s, I have to apply snap tape to the crotch of their garments often, and I forget how I got it to work from one time to the next, so I took photos and a video last time to add it here to refer to later. I used the zipper foot, 4D, and moved the needle to the far left position so the snaps would be to the left of the presser foot.
Zipper Foot 4D
Pin Between Snaps