What if you left the entire upper part of the window (equal to the bulkhead height) as a faux transom look?

I hadn't thought of that Pennydesign. However I am doing a double cassette, double blind with solar sheer in front and black out in back. So I would lose the black out.

option 2

Just thought of a 3rd option...... 3 blinds, which match up with frames and are of more or less same size. Third one, includes going under the bulkhead, and leaving little upper window open. So instead of 1 extra wide blind and one medium.

Pro: more balanced

Con: more choppy - with 3 blinds instead of 2.

Hey that could be an option. Thanks pennydesign!

How about a top-down cellular shade: when open, the fabric sits at the bottom of the window; you pull the fabric up to cover the window, the opposite of the usual.

Bali offers cellular shades with up to one or two shades on one headrail. You could have two blinds, one that covers the left, operable window and one the covers the rest. You could pull both blinds all the way up for maximum coverage, or leave them part way down, leaving the top part of each "window" uncovered.

Of course, you could get one full-width blind and leave the tops of all three "windows" uncovered.

-- amateur

What about asking the neighbours what they did ?