/sys$common/syshlp/helplib.hlb LANCP, SET, ACP, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  LANCP> SET ACP/ECHO/FULL

      This command enables tracing of received and transmitted
      downline load messages. The /FULL qualifier displays the entire
      contents of received and transmitted downline load messages.