It would be very nice to be able to see a list in each resource of all my highlights/markings/notes within that resource and showing part of the marked text. That way I can easily get to important ideas that I've marked and jump back and forth among them, like with the "bookmarks" tab in pdf readers. Each time I add a marking or note in a pdf document, the addition is included in the "bookmarks" tab with part of the text.

Right now exists the possibility to jump between highlights, but without seeing a list of the the highlighted texts. If there are many highlights in a given resource it can be very tedious going through them all one-by-one in order to find what your looking for.