SF Good Questions: Help With Window Treatments for My Loft?

AT:SF, Unlike the previous owner, I am looking for a crisper look for my loft. I plan on painting this 18' wall white, but am at a loss on where window treatments should begin & end. Do I keep rods inside arches at tops of windows, or install hardware farther up the wall above? If on wall, how far up? Halfway, a few inches, all the way to ceiling?...

...Not sure where they should end, either. Should they touch the sill, or go down to top of exposed 1' high concrete ledge under windows, or all the way to floor?

Lots of variables here: height of wall, uneven arches, those funny little built-in steps, & concrete ledge under right window. Help!



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