First, Bear is awesome. Thank you for making it.
Second, I would love PDF annotation and highlighting to be baked into Bear/Panda editor..
(I understand that this is possible on iOS by tapping the markup pencil icon. But that icon doesn’t show up on macOS in Quick Look. I don’t know why. It works for me in other apps.)
I don’t believe there is any frame work for this on macOS for Bear to use. I’ve never seen this in any other app on macOS, unless they’ve whole system around it, outside macOS. And example would be Evernote.
Craft does it using macOS and iOS built in conventions.
We checked this Craft functionality and indeed they have editing within Outlook. Sadly this functionality is limited (???) to Catalyst apps 
As soon as possible I’ll send a feedback request to Apple about this.
Hello,
Was there anything ever back from Apple on this? PDF annotation is a feature I would love to see, considering how important its for knowledge work and Craft does it so well.
Hi @trix180, I’m really excited about the markup/annotation feature for PDF and PNG files. I can make changes to iWork documents directly in Bear without any problems. But for PDF and PNG files, I need to save them on my Desktop, make the changes, and then add them back to Bear. Any news from Apple on this? Thanks a bunch!
I’m afraid I don’t have news regarding this particular subject.
Damn! Why does Apple allow such functions in their own Notes app but not for third parties 
For some strange reason the Mac Apple Preview app does not save the PDF back to source.
The good news is that both Foxit Reader, Adobe Acrobat, and Readdle PDF Expert do what we want.
So installing and setting Foxit Reader, PDF Expert or Adobe Acrobat as default PDF app, will solve this issue with PDF annotation/edits in Bear on Mac:
1) Click on button Open with PDF Expert (or Foxit Reader or Adobe Acrobat):
2) Annotate and save with Foxit or PDF Expert:
3) Refresh Note by using shortcut ⌘' (to toggle folding twice) to see the changes in note’s PDF preview:
So point 3) is an extra step, but only if you want to see the changes immediately.
Using shortcut ⌘' to toggle folding twice, will refresh PDF Preview 
All changes to PDF syncs nicely to the other Bear devices you may have …
PS.
PDF Expert doen’t seem to have a free version with annotation capabilities for Mac anymore ;(
But I have tested the free Foxit Reader for Mac, which is another great free alternative to Adobe Reader, also supports annotation and works the same way as described above.
For some strange reason the Mac Apple Preview app does not save the PDF back to source.
This is weird on Mac and I always wonder why it’s like this. As on iPad I can seamlessly highlight and write stuff on pdf and it syncs across all my devices in bear notes.
Hmm, I didn’t know that other PDF readers can save back to Bear. But I’ve never been a big fan of Adobe Reader. It always seemed to come with a bunch of extra stuff and wasn’t very well integrated. PDF Expert looks nice, but it’s a bit too expensive for the features I use. I guess I’ll just have to wait until Apple fixes that issue with Preview and Quick Look. I love Bear too much to give it up for that small problem.
PS. The free Foxit Reader for Mac, is another great and free PDF Reader that supports annotation and works the same way as described above
Thanks for the tip. I never tried Foxit Reader since I heard that it’s not well adopted for Mac. I might give it a shot. I also read that Skim quite nice on Mac.
