I would like to see a drop-down list of everything that is open in Logos 4. I sometimes have 20 or more books open at the same time and can't remember which quadrant book on looking for is contained. So I have to scan the title bar of as many as eight blocks of books until I find the one that I use again. So it would be great to have a alphabetical drop-down listing of all open books that would quickly take you to the one you need.