It contains items having to do with the arranging and visibility of Sophie book windows and their content. The Window Menu is invoked by Alt+W or Window in the Menu Bar and must contain following options: * Cascade – Arrange open windows in a cascade. * Tile – Arrange open windows like tiles. * New Window – Opens a new window. * Close Window – Closes the selected window. * Window 1(Window 2, Window 3,...) - Opens the window with the book, which name corresponds to the book title. If the user selects Window 1 the window with name Window 1 is opened. * There must be a visible marker on the selected window in the window menu (for example tick). [[Image(source://trunk/doc/SpecDiagrams/WindowMenu.png, 20%)]]