Expand/unexpand window possible?

[Lars Haugseth]

When typing C-x 1 in a multi-window frame, the current window will fill
the entire frame, but all other windows will be deleted so that there will
be no going back to the previous multi-window setup. Is there any way to
achieve this expand/unexpand functionality without major elisp wizardry on
my part?

-- 
Lars Haugseth

"If anyone disagrees with anything I say, I am quite prepared not only to
 retract it, but also to deny under oath that I ever said it." -Tom Lehrer