I have marked zones in my prometheus rad bar chart to denote upper and lower thresholds. I would like to add tooltip for this marked zones. How to achive this functionality? Also when I use RadToolTipManager how to change the Text property of RadToolTipManager for various bars according to their active regions? I didnt find any active region property for marked zones and hence I am confused how to show different tooltip text for a mouse over event on marked zones.