If you need to, you can stick post-it notes all over the individual documents, you can scribble in the margins, you can use colored flags to remind you where you are. (Labels, Status, Keywords, Document Notes, Annotations and Comments.) You can be as messy or as organized as you like, working from a neat Chapter by Chapter outline, or writing scenes at random and shuffling them around every other day.
Then again ... what if you have a large projec, lots of induvidual documents, outlines, research.
And you have indeed made comments all over the place. How do you go trough them all? In the tutorials I found, it seemed so easy, all the comments was in one list in the inspector, and they worked as a book mark. But for me, only the comments in the document currently at hand was visible ... I may be wrong, but it seems to me that the mac-version has so much more. It's not very easy learning a software where most of the tutorials on youtube is showing you features you don't have.