I am finally getting around to showing you my Greek Key trimmed drapes. I purchased this blue greek key fabric from Premier Prints. I bought enough yardage for the length of my drapery.
I then opened it up and placed the edge of the drapery inside the folded area. Making it where the Greek Key would be on the front & back side of the drapery. To attach the trim I used hem tape- and ironed it on. (forgot to take a photo of that part). You could also sew it on, but I didnt want a seam to show so I choose the hem tape.