Popup Text with controlled bullet info

I am a newbie at creating blueprints. So I am hoping someone here has some direction for me. I am trying to develop a virtual set that will have some popup text about an object on the set. The idea is to have the live talent walk up to the object and a title will appear. Then as he talks about the object/subject, bulleted info text will appear to underscore what he is talking about. I am guessing that someone other than him will activate the bullets through the use of a blueprint at the proper time? Or is there a way the talent would activate them?
What might such a blueprint look like?