Thank you for the response, pletz. It appears you cannot group signals that are already a group, i.e. it considers a bus a "group." So when I ungroup everything, I get a million signals like address[0], [1], [2], etc. Then when I group it back, it treats it as one huge bus. So, the group feature seems more like a bus feature rather than a "related signals" feature. What I hoped I could do is group related signals and subgroups of signals, like having an address bus as one element and some strobes as separate elements, without having to look at every member of address as a discrete.