Pat, you start with a rectangle piece of fabric and then fold the bottom up. I think I did 2" folds about 5 times. I then tag gun the back of the pleats on the sides to give it a nice drop vs. the fabric just flopping down on the sides. I hope this helps.

Thank you so much. What's a tag gun? Glue? Really looks nice in the photo.

A tag gun is something quilters typically use to attach layers together before sewing. There are so many different types with so many different barb sizes. The "dressing" of a window treatment is just as important as the fabrication .