Managing users in Groups in 10.3.9 Server

I'm using OS 10.3.9 Server and have a question about managing users in groups. I can't figure out how to sort the users within a group listing. You would think that you could just click on the Name bar to sort by name (just like when you are managing just users not in a group) but nothing happens. It's difficult to manage a large list of users within a group when you can't sort them to quickly find if a user is in the group or not. Thanks, Chris