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Applications that are currently running will have one or more triangles on the left side of the icon indicating the number of application windows open for this application. Running applications also have a back-lit icon on the Launcher. \marginnote{Some also refer to an application in the foreground as being \emph{in focus}.}\marginscreenshot{02-Launcher-triangles.png}{ss:Launcher-items}{The triangles on each side of the Firefox icon indicate Firefox is in the foreground and only one window is associated with Firefox at this time.} The application in the foreground (\ie, the application that is on top of all other open application windows) is indicated by a single white triangle on the right side of its icon.