VMS Help DSR, DSR Commands, .LIST ELEMENT, Defaults  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    o  If you have not entered the .LIST command with a specified
       character to appear in the left margin, you will get the kind
       of sequence that you specified in .DISPLAY ELEMENTS.

    o  If you have not entered the .DISPLAY ELEMENTS command, you
       will get decimal numbers, each followed by a period and two
       spaces.