Summary: Whether new windows should always be placed on top
The normal behavior is that if a new window is not given the focus (since, for example, the user has interacted with another window after launching an application), then if the window would be stacked on top of the focus window, the window is instead stacked beneath and flashed in the taskbar. This behavior can be annoying on large screens and multihead setups where the taskbar is hard to notice and difficult to get to, so this option, if set, disables this behavior, and new windows are always placed on top, whether or not they get focus. Note that if this option is set, a new window may completely hide the focus window but not get focus itself, which can be quite confusing to users. Also, note that setting this option breaks the normal invariant in the 'click' focus mode that the topmost window always has focus, so its most suitable for use with the 'mouse' and 'sloppy' focus modes. This key also affects windows that try to activate or raise themselves themselves but don't succeed in getting the the focus. Without this key being set, such windows are flashed in the taskbar. With this key set they, like entirely new windows, are raised but not focused.