Enables or disables automatic positioning of windows on the screen.
  By default, AUTO_POSITIONING is ON and windows are automatically
  positioned based on their size and the order in which they were added.
  Windows will be positioned so that they do not overlap, but they can
  extend, fully or in part, beyond the physical limits of the screen.
  Attempting to MOVE a window sets AUTO_POSITIONING to OFF and allows
  windows to be positioned manually. To reposition a window, you must
  first SELECT the window to be moved if more than one window is
  being displayed and then MOVE the window to its new position.  When
  you position windows manually, windows are allowed to overlap. For more
  information on moving windows manually, see help on SELECT and MOVE.

  Format:  SET AUTO_POSITIONING ON
           SET AUTO_POSITIONING OFF

  Note:  The SET FUNCTION MOVE command and the MOVE command
         implicitly set auto-positioning to off.