As a PhD student, if you are using Linux I'd highly recommend you to check out Sioyek (https://sioyek.info/) - works great for annotation/academic research.
It's made for reading technical books/papers and has quite a quiver of functionality supporting exactly that. Was discussed on HN twice already, last thread can be found here: https://news.ycombinator.com/item?id=30395649
It's made for reading technical books/papers and has quite a quiver of functionality supporting exactly that. Was discussed on HN twice already, last thread can be found here: https://news.ycombinator.com/item?id=30395649