I have a great book, two actually with very thorough instructions on how to make the panels, measure and divide the fabric into pleats, etc.
BUT . . .
What I cannot find any info on is how to estimate the setback. I want the rod to extend past the window frame so that when the curtains are completely open they do not cover the glass at all. But how do I know how much it will bunch up when open? Because I have to add that to the length of the rod and the width of the finished panel. Is it just me or does this seem like a chicken and egg sort of problem??

And to complicate things further, one of the windows is a huge picture window so it's really going to make a difference on that one.
Anybody have any experience, ideas, encouragement?