WINDOW - a graphics statement that defines the dimensions of the
         current viewport
Syntax
  WINDOW [[SCREEN] (x1,y1)-(x2,y2)]
    - If all arguments are omitted, the view coordinates will be the
      same as the screen coordinates
    - (x1,y1)-(x2,y2) are a set of single-precision numbers that specify
      the "view coordinate" values for the border coordinates of the screen.
    - The optional SCREEN keyword is a <DETAIL>
 
See Also  <SCREEN STATEMENT>  <VIEW>  <WIDTH>