The Files windows may be "maximized" horizontally to the full width of the FS/2 frame window, and the Directories window may be "maximized" horizontally to the full width of the FS/2 window less the width of the Drives window, by mouse clicking on the subwindow maximize control or double clicking in the window titlebar. Another mouse click on the same control or double click in the title bar restores normal window size. These controls provide versatile window sizing options, including four levels of zoom; normal, FS/2 window horizontal size, full screen normal and full screen horizontal size.
Maximized
Files Window