screen: Next and Previous

 
 7.1 Moving Back and Forth
 =========================
 
  -- Command: next
      ('C-a <SPC>', 'C-a n', 'C-a C-n')
      Switch to the next window.  This command can be used repeatedly to
      cycle through the list of windows.  (On some terminals, C-<SPC>
      generates a NUL character, so you must release the control key
      before pressing space.)
 
  -- Command: prev
      ('C-a p', 'C-a C-p', 'C-a C-h', 'C-a <Backspace>')
      Switch to the previous window (the opposite of 'C-a n').