VMS Help DTM, COMPARE, Command Qualifiers, /PARALLEL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   /PARALLEL
   /NOPARALLEL (D)

   Specifies whether the lines that do not match in the result and
   benchmark files are formatted side by side.

   If you specify the /[NO]PARALLEL and /SCREENS qualifiers together,
   Digital Test Manager performs the comparison screen by screen and
   ignores the /[NO]PARALLEL qualifier.