cDEC$ FIXEDFORMLINESIZE

  Sets the line length for fixed-form source code.  The directive
  takes the following form:

  cDEC$ FIXEDFORMLINESIZE:{72 | 80 | 132}

    c        Is one of the following: C (or c), !, or *.

  You can set FIXEDFORMLINESIZE to 72 (the default), 80, or 132
  characters.  The FIXEDFORMLINESIZE setting remains in effect until
  the end of the file, or until it is reset.

  The FIXEDFORMLINESIZE directive sets the source-code line length in
  include files, but not in USE modules, which are compiled
  separately.  If an include file resets the line length, the change
  does not affect the host file.

  This directive has no effect on free-form source code.

  For compatibility, !MS$FIXEDFORMLINESIZE can be used in place of
  cDEC$ FIXEDFORMLINESIZE.

  Examples:

  Consider the following:

  CDEC$ NOFREEFORM
  CDEC$ FIXEDFORMLINESIZE:132
  WRITE(*,*) 'Text that goes past the 72nd column without continuation'