EDT Line
  Moves the cursor a line at a time in the current direction---always going
  to the start of a line.
  Steps:
     1.  To set the direction, use FORWARD (KP4) or REVERSE (KP5).
     2.  Press the EDT Line key (KP0).
  Usage notes:
  o  In forward direction, moves to the start of the next line, if any.
  o  In reverse direction, moves to the start of the current line or, if
     already there, to the start of the previous line, if any.
  o  For continuous movement, you can hold down or repeat KP0 until you
     reach the bottom or top of the buffer.
  Related topics:
     CHANGE DIRECTION    END OF LINE    MOVE BY WORD    START OF LINE