The NEXT GROUP clause specifies information for the vertical
  positioning of the next report group on a logical page following the
  presentation of the last line of a report group.

  Format -

                 { next-group-line-num           }
   NEXT GROUP IS { PLUS next-group-line-num-plus }
                 { NEXT PAGE                     }

1 - next-group-line-num

  is a positive, one- to three-digit integer value greater than zero.
  It represents an absolute line number on a logical page and
  establishes a print line for the next Report Writer report group.

2 - next-group-line-num-plus

  is a positive, one- to three-digit integer value.  It represents a
  relative line number on a logical page and establishes a print line
  for the next Report Writer report group.