What are floating or sticky windows?
While the usual appellation for this feature is typically called “sticky windows” by other window managers, calling them “floating windows” will seem more intuitive in light of how floating desktops work. Specifically, floating windows are windows that do not slide with a floating desktop. That is, they float independently of anything behind them, much as floating desktops themselves do. As a point of fact, they float on top of the the topmost floating desktop and will thereby seem visible from all floating desktops until the window in question is made normal again, and results in it immediately dropping as a normal window on the currently visibile desktop.