             ------- CIRCLE (Function Key) -------


--  To draw a circle using this function key, there must be 
    two flashing "+" on the screen.  If there is only one,
    use the cursor control keys to split them (they're at the same location).

--  Pressing the function key will draw a circle on the screen which has
    its center exactly half way between the from pt and the cursor.
    The circle will pass through the from pt and the cursor.

    NOTE  After drawing the circle, the from pt and the cursor will
          be at the same location; and only one flashing "+" will appear.
rawing the circle, the from p