Library /sys$common/syshlp/dbg$help.hlb DEBUG, EXAMINE, Qualifiers, /LINE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LINE (default)
       /NOLINE

    Controls whether program locations are displayed in terms of line
    numbers (%LINE x) or as routine-name + byte-offset. By default
    (/LINE), the debugger symbolizes program locations in terms of
    line numbers.