Are the states 1_, _1, A, etc. used by anything anyone? I can't seem to find those anywhere so have not added them into my framework as of yet... hummm... maybe I will just harvest them out of the campaign zip...
They are for applying code letters/numbers to marker tokens.
Imagine that you want to label a bunch of rooms. So you drop down a marker token, one per room, and type in the description (both player and GM) into the proper Notes' fields on the token.
But you have no number that references back to your module.
You could create a different graphic for each marker, but that's a lot of redundant work. So putting states on them is easier. And with a macro to create/initialize the marker, a lot of it can even be automated. Imagine using copy/paste from a PDF into a text field. The macro then parses out the room number, room title, and the boxed text and populates the macro for you. The room number is changed into states and also copied to the marker Name, the room title is put into the GM Name field, and the player and GM notes are also added automatically.
Having said all that, I don't use that technique. I create markers, but I simply change their name to the room number. I haven't created the macro I mentioned above because I go through spurts of "map prep" and between spurts I don't want to spend time on it, and when I need to create a new map I don't have time to build a macro -- I just want to get it done. "Why is there always time to do something over, but never enough time to do it right in the first place."