EDT/WPS Delete Start Line
  Erases a line, starting with the character left of the cursor.  If the
  cursor is at the start of a line, erases the previous line, if any.
  Key:   EDT keypad        WPS keypad
         -----------------------------
         CTRL/U            GOLD-DELETE
  Steps:
     1.  Put the cursor to the right of the text you want to erase.
     2.  Press the Delete Start Line key (see key list above).
  Usage notes:
  o  At the start of a line, Delete Start Line erases the previous line,
     making the current line move up.  This is useful if the previous line
     is blank, so you join paragraphs for FILL commands.
  o  To insert what you erased, use the RESTORE LINE command (with the EDT
     keypad, press GOLD-PF4).
  Related topics:
     DELETE     ERASE LINE     RESTORE     RESTORE LINE