I have a 2x4 ltg fixture. In a specific project we have multiple instances of this fixture. They are labeled "A1" or "B". is there a way that i can have my fixture tag (type mark) show different types? I had about 10 fixtures in the drawing all labeled with A1, i added another and tried changing it to a type B and all the A1's changed to B's. What am i doing wrong here?