VMS Help DEFINE, /FORM, Qualifiers, /TRUNCATE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /TRUNCATE (default)
       /NOTRUNCATE

    Discards any characters that exceed the current line length
    (specified by the /WIDTH and /MARGIN=RIGHT qualifiers). The
    /TRUNCATE qualifier is incompatible with the /WRAP qualifier.
    If you specify both the /NOTRUNCATE and /NOWRAP qualifiers, the
    printer prints as many characters on a line as possible. This
    combination of qualifiers is useful for some types of graphics
    output.