'''Window decorations''' are provided by Windowing_systems to improve the usability of a multi-windowed desktop. They typically consist of a main bar along the top of each window and a minimal border around the other three sides, although this can often be varied upon if the user wishes. In the predominant layout for modern window decorations, the top bar contains a title and buttons which perform windowing-related actions such as closing or minimising. The border exists primarily to allow the user to resize the window. Window decorations are important in developing the Look_and_feel of a Desktop_environment - they are part of the reason why Apple Mac_OS_X is distinguishable from Microsoft Windows, even at first glance.