Parameters

 

n

   The subpage letter that will be appended to the number of the
   next page. You can specify the letter itself (A) or you can
   specify a number corresponding (in order) to the letter that
   the subpage will have. For example, 1=A, 26=Z, 27=AA, 28=AB.
 

+n

   Specifies how many alphabetically ordered letters past the
   current subpage letter the next subpage letter will be. For
   example, if the current subpage is page 3-12E, then .NUMBER
   SUBPAGE +2 will cause the next subpage to be numbered 3-12G.
 

-n

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