How do you add images to visited state smart shape buttons (or even to the default) and the content pop up, when using states?

I have three smart shape buttons that are using states to display various content. I want to add images to the content pop ups but my media button along with most of the tools in the tool bar are grayed out. I know I can't add any buttons or interaction in the state pop up, but based on a webinar given by Pooja I should be able to add images to both the buttons (like a check mark after it was visited) and to the pop up content.  I am using Captivate 2017. Please advise.