Annotate documents in DT with bookmarks

How can you annotate documents (PDFs and .doc) within DT with bookmarks? I know you can highlight and add notes but I haven’t figured out how to place bookmarks in a PDF or .doc?

I’ve got about 10 or more PDFs for a particular topic, each PDF has up to about 50 pages, however, in each PDF there is only one or two pages that have information pertaining to that particular topic. I’d be great if I could bookmark these pages so that when I need to research that topic and look into my collection of PDFs I can quickly flick through just the bookmarked pages in each PDF rather than having to plow through up to 50 pages each time because I’ve forgotten which one or two pages had the information on the topic.