The window manager menu
At the upper right corner a small menu appears if any window is opened. It contains a popup menu which allows to switch between the windows and a "close all" button which closes all currently opened windows.
If you click onto the menu symbol (the little triangle left to the close all button), a popup menu will appear which contains a list of all opened windows with their symbols and titles.
By clicking onto one of these titles, you can display the corresponding window and bring is also to the first position inside the window manager.
