LINE - (0)

 Moves the cursor forward or backward to the nearest beginning of a line,
 depending on the current direction (see ADVANCE and BACKUP).

 OPEN LINE - (GOLD 0)

 Breaks the current line into two lines.  The break is placed after the cursor
 and leaves the cursor position unchanged.  Pressing the OPEN LINE key when the
 cursor is at the beginning of a line creates a new blank line.