From David Sparks...
GoodNotes Releases Collaboration Update — MacSparky:
With GoodNotes, it’s easy to mix drawing and writing. It’s also easy to write in a magnified view while the words simultaneously appear in a normal size on the page behind it.
And with yesterday’s version 5.5 update, GoodNotes is now also able to collaborate.
I use Apple Notes for most mixed media note taking (text, checklists, images, web links) and DEVONthink for my archiving needs (long term file, email, web archiving). But most notes I write by hand go in GoodNotes. It is nice to see any app add collaboration as a feature. I am not sure if I would use this in GoodNotes but it will be fun to try.
The other thing I use GoodNotes for every day (when school is meeting in person) is for annotating my custom-made seating charts to keep track of student data. You can read about that on this article I wrote for SBO Magazine. What makes GoodNotes so convenient for annotating PDFs like this is that it treats them as a paper style instead of fillable PDF, so you don't need to go into any kind of annotation 'mode' to begin marking it up with the Apple Pencil.