The top of the panels is folder over 1.5 inches twice, on this edge are the grommets and button holes. I ran out of grommets and since my machine does automatic button holes I figured it would actually be quicker to do the button holes. The 1.5" hem was stitched down near the folded edge farthest from the top and then the button holes were done. They were pretty small but it just needs to be wide enough for a cord to go through, right now I'm using a shoe string.
Here's a look at the fabric while I"m pressing up the 1.5 hem for the bottom Plex Pipe to feed through