SET(REVERSE)
  Sets or changes the direction of the specified buffer to reverse (toward
  the left and up).  The default setting is forward.
  Syntax
     SET (REVERSE, buffer)
  Example
     SET (REVERSE, CURRENT_BUFFER);
  Sets the direction for the current buffer to reverse for searches and
  movement.
  Related topics
     SCROLL   SET(SCROLLING)   SET(FORWARD)