Here is the correct place :D:D:D
When you are on a page you want to bookmark, click on the Bookmark word at the top of the page, right above the first persons name. Here, that would be above your's :D
A little window will appear next to that, and you click on whether you want it private or not and then click on save.
Then when you want to view them, look at the very top of the page under Quilting Board and click on My Bookmarks. There you can add notes next to each bookmark too:D:D:D