The DISPLAY statement transfers low-volume data from the program to
  the default system output device or to the object of a mnemonic-name.
  The HP extensions to the DISPLAY statement (formats 2 and 3) are
  COBOL language additions that facilitate video forms design and data
  handling.

  Format 3 -

   DISPLAY screen-name

      [    {| LINE NUMBER { line-num }     |} ]
      [    {|             { line-id  }     |} ]
      [ AT {|                              |} ]
      [    {| COLUMN NUMBER { column-num } |} ]
      [    {|               { column-id  } |} ]

      [ END-DISPLAY ]

1 - screen-name

  is the name of a screen item defined in the SCREEN SECTION of the
  program.

2 - line-num

  is a numeric literal that specifies a line position on the terminal
  screen.  Line-num must be a positive integer.  It cannot be zero.

3 - line-id

  is the identifier of a data item that provides a line position on
  the terminal screen.

4 - column-num

  is a numeric literal that specifies a column position on the terminal
  screen.  Column-num must be a positive integer.  It cannot be zero.

5 - column-id

  is the identifier of a data item that provides a column position on
  the terminal screen.