Want to take a trip line, and then press the line, a total of 2 lines. Single needle from the material edge 3mm, double needle spacing 6mm.
All zippers to go 2 lines, but the cloth has shown a trip, but also shows two times.
B. Zipper up and down to be generally long, can not have wrinkles.
C. If the zipper has a pull head, open it from left to right.