The window menu contains the following commands:
New window: Open a new window containing a copy of the current tab definition.
Cascade: Cascade the open windows (so that they are all visible, and overlap each other).
Tile: Tile the open windows (so that they are all visible, and are adjacent to each other, sharing the available screen area as equally as possible).
Arrange icons: Neatly arrange all minimized windows, so that they are all visible, starting at the bottom of the screen.