Textbox trigger interactive event

I am having problems in making the whole text-box interactive. I want that a picture and a new text-box appear by clicking on another text-box. I only manage to do it by clicking precisely on the letters of my text-box. What I need is, that I can click on something like an outline for the interactivity to trigger, so the click doesn't need to be precise on the letters.

Thank you in advance.