PDF note-taking enhanced with support for text comments

vygadeka 

I have mixed feelings...

Annotation in Edge works fine, and you can later open the saved PDF with Acrobat or PDF Expert.

But the integration with OneDrive is not ideal: if I choose "Open in browser" from OneDrive and add comments, I would aspect that my comments are saved automatically. Instead, I am asked to save the file again in a different location (the last one in which I downloaded something). This is a recipe for losing your comments because you will easily end up with two versions of the same file.

When I open a PDF file in the browser through OneDrive, I would expect the same behaviour that I get when I open a .docx file in Word online.

Right now, the default visualisation of pdf files in OneDrive is of little use. I would prefer that a double-click on the file in OneDrive just opens the file for reading/editing (if you are on Edge; just for reading on other browsers) and save it automatically if you highlight or comment.
This would make it possible to SHARE annotations on a PDF, which has been possible on Google Drive for about two years.

Of course, you can do shared annotation of PDF files with Hypothesis, which is great for a university course but an overkill for short texts and exercises. Shared annotations of PDF with OneDrive+Edge would look like shared editing in Word Online and give a consistent experience when both writing and reading.
Or maybe you could just give an option of opening PDF in Word online in "comment alone"-mode.

There are third-part solutions for shared PDF-annotation, but it would be far better to have shared annotation integrated in OneDrive as an environment for reading and writing. This would also help prepare geeks and researchers to eventually go over to an "universal" online annotator like Hypothesis.