Where Does Ym Store Contacts YM Appearing In Bottom Right Hand Corner?

YM appearing in bottom right hand corner? - where does ym store contacts

When I see someone who is me on Yahoo Messenger contact list tries a field in the bottom right corner of my screen. I clicked and does nothing. It seems to have the opportunity to work anywhere in stores this information for you to call back if we wanted to talk. What to do if you are given the option, and where information is stored or saved?