What is CLFSWM?
CLFSWM is a highly dynamic. 100% Common Lisp X11 window manager. By default there is only one frame (the root frame). Other frames are created/deleted on the fly. A window can be in more than one frame, so it can have multiple views of the same windows.
Using CLFSWM is like walking through a tree of frames and windows. Enter in a child to make it the current root and make it fullscreen maximized. Leave it to make its parent the current root.