/sys$common/syshlp/helplib.hlb CMS, DIFFERENCES, /CLASS, Qualifiers, /PARALLEL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Controls whether the differing member generations from the two
    classes are formatted side by side. If you specify /PARALLEL,
    the differences from the first class are displayed on the left
    and the differences from the second class are displayed on the
    right. The heading of the differences report displays the class
    name of the first class on the left and the class name of the
    second class on the right.

    By default, the width of the listing is 132. Use the /WIDTH
    qualifier to control the width. Vertical lines separate the text
    on the left side of the report from the text on the right side.
    The text from each of the classes is allotted equal space (half
    the width of the full report).

    If a line from one of the classes being compared is longer than
    half the width of the full report, the line is truncated on the
    right. A plus sign (+) is printed at the end of the line to
    indicate that the line has been truncated.