Collaborative annotation of documents

I am desperately looking for a tool which would allow me to collaboratively annotate and run conversations over pdf documents in similar way how google docs or MS word do (without the need to edit the pdf in any other way beyond highlights and comment insertion).

As a huge bonus, the tool would integrate with Zotero as seamlessly as possible so that one has
one integrated reference managed and collaborative annotation workflow.

Despite my considerable search I have yet to come across a product or workflow solution that would fully cover this scenario?

The closest solution I found so far is Google Drive preview which does allow for inserting comments into shared pdf documents which then can be further annotated by others. But I don't know how to integrate this with Zotero workflow.

Any tips?
  • edited January 24, 2022
    Yes, the new PDF reader in the Zotero beta (which will become Zotero 6) will allow collaborative annotation of PDFs in groups, without any modifications to the PDF. The new PDF reader has been limited to My Library during the beta for safety, but we'll be expanding that to groups soon.

    The reader doesn't currently allow comment threads as on Google Docs, but annotations by group members will be identified by their names. Being able to comment on annotations is something we could consider if there's enough demand.
  • That is fantastic news. Adding the ability to comment on annotations would make
    Zotero the ultimate reference manager for us.

    To follow up, if one enters a note into a shared pdf, will another person be able to modify this note? If that is the case, one can emulate the comment response through this. But of couse full-fledged response system like say in google docs would be faster and less clumsy.

    Is there any ETA on when the annotations will be enabled for shared documents?

    If I may, one last question. Is there any plan for notifications that let you know a document one is sharing has new annotations by someone else?

    In this era of running research groups over Zoom half the time, having these remote collaborative features is a godsend. Thank you for your efforts.
  • edited February 2, 2022
    if one enters a note into a shared pdf, will another person be able to modify this note?
    Group admins will be able to modify all annotations. RegularGroup members will be able to edit only annotations they've created. We'll think about comment threads, but for now members could drop note annotations next to existing highlights to make comments.

    Group annotations should be up within the next couple weeks.
    Is there any plan for notifications that let you know a document one is sharing has new annotations by someone else?
    Some visibility into group changes is planned, but nothing concrete to share yet. I agree it would be particularly useful for collaborative annotation.
  • Comment threads would be really helpful for my personal workflow as well—eg, to be able to make an annotation and then add a comment or workflow status to it after
  • @JanAntolik: Group annotations are available in the latest beta. (No comment threads yet.)
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