Pin one Mac window while arranging the rest

Turn on Pin Mode so one window stays put and the other windows reflow around it.

Pin Mode holds one live window and reflows the others around it. A spec, a call, or a chat stays where you put it while you throw and snap the rest. It does not float that window above every app. A picture that should float is a Shoverlay pin.

Pin, then arrange the rest

You can download Gablet.Grant Accessibility, quit Gablet, and open it again.
Turn on Pin Mode in Settings. Show it in the menu if you want a click target.
Pin the window that should stay. Throw or snap the others around it.

macOS 11.5 or later. 7-day trial, then a paid license. No usage tracking.