Storyline: Compare Learner Response with Expert Recommendation Using Variables

This is great. I'm looking to do something similar with large images of data. I want the learner to look at the picture and then type in the free text their observation. My challenge is that the graphic is too small to see the details and the "zoom" feature doesn't expand the graphic larger enough, so the graph/data is taking up the entire page, which I don't like visually. That doesn't leave room for free text. Is there a way to lightbox the free text? I need ideas.