I've just started to use the experimental 'Fetch Annotations' - and what an excellent feature - thank you Calibre!!!!
I can see them on the Calibre version of the book on the right side of the main library page in the book details area.
But where are they in the Calibre version of the book itself?
That is: where are the annotation notes and highlights?
I can end up with upwards of 100 highlights and annotations per book, which I don't think would be unusual in research studies.