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.