Leaving this note just in case you wanted more use cases for how folks structure their balsamiq metadata pages - mine wires are never as large as this one though…20 pages or so is pretty average before I break it up into different documents.
I have a table of contents that I add to the front of my decks. I merely need a list so right now I use the “list” and link each line to the page. It can get time consuming if I forget to set it up at the beginning and have lots of pages. But it’s not too much trouble at all and it exports to PDF just fine and doesn’t take up much space.
I’ve not used the site map control, if it’s the one with the boxes and the “site map” look - that’s a bit intense for just a TOC, I might add it as a page if the site structure was important, but I wouldn’t use it to replace my TOC today. A simple list is sufficient.
I also have a change log - which is more like the grid structure shown here that I use as well since I want that with columns and (ideally) linking (but I’ve never bothered with that - too much manual work.)