[Koha] cardnumbers, and borrowernumbers

Hi all, I have Koha up and running, it is wonderful, especially compared to what we are using currently. I have a few questions still, just to make our lives easier. When I add children to a member, the screen will show me the membernumber (borrowernumber), and a textbox where I can fill in the cardnumber. Now our cardnumbers are derived from the membernumber (not the same), so that is great. But if I add a member, there will be the text member#, Card number* and then the textbox for the cardnumber. I cannot see the membernumber on this screen, and I need that for the cardnumber. Is there a way to show it there? I think it should? Or do I miss something? Thanks again, Marty Jongepier