keybord shortcut

hi,
i got a quick question, because i couldn t find it in the manual. Is there a keybord shortcut if you have doubleclicked (maximized) a graph window and now you want to swith between graphs? (open graph windows). Hope you understand what i mean, thanks for any help.

If your chart are maximized, to see other chart already open
you 'CTRL-TAB' to switch...

thank you, this helps a lot.