The margin already holds a picture and free facts, but nothing asks for them, so pages go without. This makes the margin an infobox, as on Wikipedia: the page’s name in a bar, the picture or a map with a caption, and the facts that matter for that kind of page. The editor starts each page with its type’s facts, empty; an empty fact is never shown. Where Quest Board already knows a fact (from sessions, a sheet, a map or a rules entry), it fills it in until the GM writes their own.
A Pathfinder 2e campaign, the same coast as the other lanes. Names and facts are made up.
Also here: 6b, the wiki page as built · the prototype index.