Title Text Box

I'm working with a template that was designed by someone that doesn't know how to design one. None of the slide have a title, they just have text boxes. They each have a title but it's not a title text box so the slides don't have titles that generate automatically. I need to update each one. To make matter worse, I have 6 of these presentations I need to update. 

I know there must be away to change a text box to a title test box / place holder on a master, isn't there?