I have to read a lot of scientific papers, where I have to refer back to concepts earlier in the document. Whenever I then click on a previous bookmark I notice that the bookmark highlighted corresponds to the latest bookmark I clicked rather than the current bookmark. I understand this kind of makes sense when the bookmarks tab is used as literal bookmarks, however, with most documents it is actually used as a Table of Contents. Therefore it would be useful if the highlight within the table of contents moves along with the reading experience such that the reader knows which chapter they are currently in. Then when revisiting other chapters, the reader also does not lose progress, by referring back to other chapters and then not being aware that the highlighted bookmark did not correspond to the actual reading progress. In my case right now, I am reading chapter 4 and want to navigate back to another concept in chapter 3, however, Acrobat highlights the bookmark Introduction. Since it is not indicated on the page that I am currently in chapter 4, I need to scroll all the way back to the last heading until I can navigate to chapter 3. It would be much more user friendly if I could just view the last "heading"/chapter/bookmark highlighted in the bookmarks tab within an instance.