How to Hide the Title Text on Bottom Layer

I'm working in the File Folder Storyline tab interaction. In order to change the title text (on the title bar) for each tab, I need to figure out how to hide the title text on the first layer when the user clicks a file folder tab. Otherwise, the text for both the first layer and the next layer appear on top of each other. I looked at the State for the text box on the first layer but couldn't figure out how to hide it when the user clicks away. I'd like to be able to use the extra room on each layer for content and not take up space with a title. The other trick to this is that when the user clicks on the first layer again, the title text box needs to reappear. Any ideas on how to simply accomplish hiding and un-hiding the first layer's title text?  Thanks!