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

    The .NUMBER APPENDIX command allows you to specify an identifying
    letter with which a sequence of appendixes will begin. The next
    .APPENDIX command starts the sequence. Subsequent .APPENDIX
    commands cause appendixes to be lettered in alphabetic order.
    See also .DISPLAY APPENDIX.

    Format

      .NUMBER APPENDIX  [[+/-]n]

    Abreviated format

      .NMAX  [[+/-]n]

1 - Parameters

 n

    The character that specifies what the next appendix letter will
    be. You can specify the letter itself (A) or you can specify a
    number corresponding (in order) to the letter that will identify
    the appendix. For example, 1=A, 26=Z, 27=AA, 28=AB.

 +n

    Specifies how many alphabetically ordered letters past the
    current appendix letter the next .APPENDIX character will be.
    For example, if the current appendix is APPENDIX B, then .NUMBER
    APPENDIX +2 will cause the next .APPENDIX to produce APPENDIX D.

 -n

    Specifies how many alphabetically ordered letters before the
    current appendix letter the next .APPENDIX letter will be.

2 - Default

    Sequential uppercase lettering, beginning with A.