I guess in the past I've always done map series based on layers that have one feature per map page to drive it. But now I have a request to do a map series based on a value, so I might have one feature that has a particular Route ID, or I might have five. I don't want five pages, I want one page that shows all five route lines of the same value. Am I missing something simple here, or can I not do that with the Map Series tool? I could dissolve the features, but I predict that will cause problems down the road when they want to do analysis on highway segments. And I don't really want to set up 44 pages by hand on data that changes periodicially.