WPS Backup

  Sets the direction of the buffer to REVERSE (left and up) and moves the
  cursor to the previous character.

  Key:   The WPS keypad defines KP1 as the Backup key.

  Usage notes:

  o  If the cursor is bound, then from the start of a line it moves to the
     end of the previous line, if there is one.  (Setting the WPS keypad
     automatically enables bound cursor motion.)

  o  If the cursor is free, you can move it anywhere in the buffer, whether
     characters are already there or not.  For example, if the left margin
     is greater than 1, you can move left of the left margin, which is
     useful for creating lists and tables.

  o  You can use the WPS Backup key as a terminator for FIND or WILDCARD
     FIND to make the search begin in reverse direction:

        1.  Let FIND or WILDCARD FIND prompt you for the search string.
        2.  Type the search string and then press the WPS Backup key.

     If you press RETURN instead, the search starts in the current direction
     of the buffer (shown in the status line).  For more information, see
     help on Prompts And Responses.

  o  With the WPS Ruler (GOLD-R), pressing KP1 sets the direction of the
     ruler to reverse and to move the cursor to the left---see help on Ruler
     Keys.

  Related topics:

     CHANGE DIRECTION     MOVE BY WORD        MOVE LEFT
     SET CURSOR BOUND     SET CURSOR FREE     START OF LINE