Comment #7 on issue 313 by audunska...@gmail.com: Merge contrib's isFullscreen and doFullFloat to core http://code.google.com/p/xmonad/issues/detail?id=313 I am not convinced that a doFullFloat is the right way to handle fullscreen; this should be up to the user to decide. I would therefore go against putting this hook into the default config. Making it available in core seems resonable though. There is a module now called XMonad.Layout.Fullscreen that sends messages to let the layouts themselves decide what to do with fullscreen windows; this seems to me like a more xmonadish way of doing things. As long as we want to provide several ways of handling fullscreen, providing a default seems counter productive. BTW, thanks for the improved fullscreen query (from alexey). I will look into using it for X.L.Fullscreen. Disclaimer: I'm the author of the mentioned module.