Why is (or isn’t) the “More Info” area showing up on my image?

If you choose “more info” instead of “URL” as the action on one or more of your areas, then the More Info area will show up on your image. If every hotspot is set to the “URL” action, then the “more info” area will be hidden.

The idea is that if you don’t have any “more info” to display, we didn’t want to use up screen space with a sidebar area that will never be used.