Skirt lining adds body and volume but it can get tricky when it involves adding a zipper too! But lining a skirt (or a dress) is a lot easier than one might think!
– skirt and lining fabric – matching thread – matching needle – contrast thread
Take your zipper and pin it to the back seam of your lining (which is wrong side out), leaving enough allowance at the top edge to accommodate the waistband.
Change the foot on your sewing machine with a zipper foot.
Using a basting stitch and contrast thread, sew down the zipper on one side, lift and pivot, sew a stitching line perpendicularly then sew down the other side of the zipper.
Slip the skirt over the lining, skirt being right side out. Match the back seam with zipper teeth perfectly and pin.
Using a regular stitch, sew down the zipper as before, slightly away from the basting stitch.