Cover, hide, or conceal areas on the screen that you don't want to see

Imagine you want to read a webpage but there is an animation that distracts your concentration. Maybe there is a graphic that annoys you and that you just don't want to see. Or you want to show one part of a document to someone, but not the whole document. If you Just had A Window to place it on top! With JustAWindow you can create as many free-movable windows as necessary to cover, hide, or conceal all these areas on the screen.