Well... I just went in and played with the Visualization Studio a bit. It appears that you're right and I can't get the Track # to appear either. I don't know why (as I said, I've never used it before).
I will say this though... I realize that it's not always easy to use precise terminology when you don't know exactly what things are called. However, it would really help you get better answers if you are much more descriptive in your question. It's always better to be too verbose than not enough.
I had no idea when you asked initially what you were trying to accomplish, what screens you were looking at, or where you wanted the Track # to show. In your initial question, you made no reference to the Visualization Studio, adding a Text Visualization, or anything similar. In fact, you referred only to Theater View (which is something else entirely -- shown in my screenshot above). If you want help from other users (we are unpaid tech support after all), do everything in your power to describe exactly what you are trying to do, including step by step, click-here-type-this-click-okay type instructions. Vague and misleading questions generate vague and misleading responses.