Hi! I have a question that I hope someone might be able to help me with.

I'm making valances similar to the one in this photo, below, except mine is a bit longer and has two ties (both 8" in from the sides) which tie at the bottom to hold the bottom of the valance up. I've decided I don't want to the do ties; instead, I'd like to sew a stationary London shade/butterfly valance like the one in this picture. Any ideas on how exactly this was done?

Thanks in advance to anyone who might be able to help!