I have a client that needs a function where a summarize box is visible in the bottom left corner that summarizes data from only the fields that are currently turned on. For example, the LIKE field in all of these layers is the population field. I have 18 layers that have the population field so if I turn all of them off and only 2 of them on, I need this box to total up the population data from those 2 layers and so on. I am sure someone has created something similar to this and was wondering if anyone had any ideas. Thank you!
