The place I work for has a naming scheme that prevents us from using a map series to produce exhibits of all of the aerials used for a project. It requires us to use the corresponding letter of the alphabet to describe what sub-exhibit it is (ie: Exhibit 5a, Exhibit 5b, Exhibit 5c...). I would love the option to be able to do page letter instead of number to be able to add that bit of dynamic text to be able to automate this process.