PamelaBonta wrote:It would be nice if there were a way to have both as a study tool - a 'mark your place' tool and 'save it to favourites' tool.

My vote would be to use bookmarks the way they are in the app - just like paper bookmarks, to hold your place.
For identifying articles as favorites (a list that could get huge and thereby make the bookmarks drop-down difficult to navigate), my preference would be to use any of the existing options:
* Create a notebook called "Favorites". Add item to the notebook.
* Tag the top of the item with a "Favorites" tag
* Bookmark it (even if bookmarks work like in the app, you can still bookmark the top of an article)
* Use the browser's "favorites" or "bookmark" feature (wouldn't sync with the app though)
...in other words, it looks like the online tool is missing a place-holder function (though you could simulate it with a tag and/or highlighting), whereas the app has (potential for) both features.
...if a new feature were going to be added, I think it would be best to make it like the Custom Collections feature, but allow individual articles or chapters to be added to the collection rather than requiring entire books.
In the meantime, it looks like when you bookmark a page online, you can add a note, tags, and put it in a notebook (all in a single pop-up), so you could use those features to specify where you left off (not as ideal as the app bookmarks, but better than nothing)...
FWIW,
Liz