What is the best way to make popup text for PoI's?

So, what I am looking for is What is the best way to make, I guess, transition Text? Meaning You went from X_Forest and enter X_Town and a text pops up on screen(Fading in Nicely)and says the name of the place you entered. Then fading out nicely. I am assuming widgets is the way to go but not sure. If you all know of a good tutorial on how to do this it would be great. Or a good explanation I’d be very appreciative. TYIA!