We have both a small Zip Dee awning that rolls out over a living room window (like the main awning) and we have Zip Dee covers that attach to the window itself. They have snaps along the top of the window and they attach to the bottom corners of the window. Those, of course, go up and down with the window. We use one mainly on the rear bathroom window along with the inside shade for more privacy.
"Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid." -- Frank Zappa