I am in an ongoing process of redoing my sewing room. I have 4 large windows (2 on each outside wall). I know I may want to put curtains on them eventually, they have blinds now. So I put up two curtain rod holders, the U-shaped kind, sort of, one in the middle and one to one side of 2 of the windows. I bought some queen size batting, turned each end and sewed a "channel" ** at the top and bottom, put a large dowel stick in each, and I have a ready made design wall almost to the floor..in my windows. The curtain rod holders can hold both dowel sticks so I can store the wall when not in use, or if I want to open all the windows.
When I decide where I want my wall sort of permanently, I can then take down this batting, use it in a quilt, and make my new wall as I see fit.
(**sorry, that is not the word I am looking for, but it escapes me for now)