Oct 25,  · One possible solution is to use a tool to retroactively copy that text into the comments, so you could then generate a comments summary. I've developed such a tool and you can find it here: Custom-made Adobe Scripts: Acrobat -- Retroactively Copy Highlighted Text into Comments. Thanks! I´ve now enabled the option, and continued to highlight. Feb 2,  · To extract highlighted parts, you can use PyMuPDF. Here is an example which works with this pdf file: points = es. quad_count = int(len