Reverse

  Sets the direction of the current buffer to reverse.  All cursor
  movement keys move toward the left and up.

  You can press a key defined as reverse to terminate SEARCH or
  SEARCH/PATTERN commands so the search begins in that direction.  (See
  help on the SEARCH command.) This does not affect the direction for other
  commands.

  Command Equivalent:

          CHANGE DIRECTION

  Related Topics:

          SET FORWARD
          SET REVERSE