If I have windows arranged into four quadrants, as from the following sequence of commands:
:tabnew
:vsplit
:split
<C-W>l
:split
then entering a command like <C-W>J
will cause these to no longer be square; in this case, it will force one window to float at the bottom.
How can I do the opposite—that is, force the windows back into a square formation?
I've read :help window-moving
but didn't see anything useful.