I really like the implementation displayed here:
Highlights with text and area selection (for images and tables) options.
It would be cool to have the changes made in logseq be in the pdf file outside of the application.
For some suggestions on a nice mobile experience, I recomend having a look at this video by
Bryan Jenks on Zotero pdf annotation feature: https://youtu.be/yjN-sdvhH3A?t=438
The UI is very clean and intuitive, but I don´t know if mirroring zotero is possible with an outline format.
Looking forward to this feature. Thank you!