I have a window called 'Codes' in window 1, and I want to move it to window 7, is it possible?
Yes, it is possible. Go to window 1, type the command character (e.g.
CTRL-A) and then type:
:number 7. If there is already a window at 7, then the two windows will be swapped (window 7 will become window 1). From the manpage:
Change the current windows number. If the given number n is already used by another window, both windows exchange their numbers. If no argument is specified, the current window number (and title) is shown.