Library /sys$common/syshlp/tracehlp.hlb ANALYZE, /SAVE_BUFFER_SIZE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    /SAVE_BUFFER_SIZE=n

    The number of screens of saved lines  that  will  be  kept.   These
    lines can be examined by using the NEXT and BACK commands.

    The default value is 30.