How to fix a zip or zipper and enclose it with lining | Sewing Tutorial

[@osamedennadi6309]

Hello, thanks for the video. How come the allowance below the zip is 1" but the zipper has 1.5" allowance? Kindly calrify.

[@arowolobusayorachael504]

Pls sis how do we do the remaining down part
I mean the slit