   DISPLAY  [position-spec] {identifier-2 | literal-1} ...
   ~~~~~~~

     [ WITH [ Attribute-Specification ]...
       ~~~~
            [ ERASE  { SCREEN|LINE }  ]
            [ SCROLL { UP   } [ { integer-3    } LINE|LINES ] ]
              ~~~~~~  { ~~   }   { identifier-3 }
                                        { DOWN }
                                          ~~~~
            [ SIZE { integer-4    }
              ~~~~ { identifier-4 } ]
   [ END-DISPLAY ]
     ~~~~~~~~~~~


     where  position-spec is
     { (position-spec-num, position-spec-num) }
     { (,position-spec-num)                   }
     { (position-spec-num,)                   }

     where  position-spec-num  is
     { identifier-1 } [{ + } integer-1 ]
     { integer-2    } [{ - }           ]

