4 itemgroups and different nr. series

I have 4 different itemgroeps and Nr series, From main inventory menu I can choose the serie(ITEM A… B… C… and D…). A,B,C or D in No. When I choose for C… with a “runformview” I 'd like to maintain the Nr series starting with C… and not an A… What is best way ? Best Regards, Mark Trouwborst LIMO Automatisering B.V. tel +31 (0)182 631 333