How to sew a Separating Zipper (not exposed) of a Raglan Sleeve Jacket

How to sew a Separating Zipper (not exposed). Category: Raglan sleeve Jacket Fabric: Cotton twill Stand Collar and snap button Overlock all seam allowance Double fold hem No cuff No pockets No lining The white and yellow tape are just a PP strap. This is in order not to slide while sewing (sewing gap). When the thickness of the fabric is different, the pressure of the presser foot and the feed dog are not stable. Putting this strap means adding the height, this is very useful. These pink and blue ar