WindowFloating
is a notebook option that specifies whether the window for the notebook should float on top of other windows when it is displayed on the screen.
Details

- WindowFloating->True is often used for palettes.
- If there are several floating windows, the most recently selected one goes on top.
Examples
Wolfram Research (1996), WindowFloating, Wolfram Language function, https://reference.wolfram.com/language/ref/WindowFloating.html.
Text
Wolfram Research (1996), WindowFloating, Wolfram Language function, https://reference.wolfram.com/language/ref/WindowFloating.html.
CMS
Wolfram Language. 1996. "WindowFloating." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/WindowFloating.html.
APA
Wolfram Language. (1996). WindowFloating. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/WindowFloating.html