Clicking on note and picture links in the main text will bring them up in this box.
Unfortunately, each such link will also add a reference to your browser's "history," making it difficult to return to some earlier pages. A link at the top of the main window allows escape from the system back to the site's "transit lounge" where there are links back to frequent destinations.
A link to return to this message is also located at the upper left-hand corner of the main text window.