you’ll need to follow the instructions linked above to open the PDF in your browser and activate Hypothesis.
But how can i locate my local-file??
I regularly post a "master" page-annotation for each local-pdf citing all relevant infos, such as, its local filename, its author, year, title, etc, BUT this "master" annotation may not come up in query in my activities page!
Could you retrofit the activity page to provide a link on each annotation to expand and show all other annotations on some resource?