The PDF is not editable in Laserfiche regardless. You can only add annotations within LF, so editing the actual PDF would require export/reimport. You have a couple options to do this where option 1 or 2 is preferred:
- Use a metadata field to capture the notes, so the users open the PDF and open the metadata pane on the right to read/add notes
- caveat is all notes would be editable and anyone could remove/modify existing notes
- Multiple users editing notes at the same time would lock the entry, only one person can edit the metadata at a time
- Use a metadata field and an embedded form. The form would populate a collection with the previous notes, and allow for one or more additional notes. On submission update the entry's metadata
- More complex setup for the form
- Not necessarily real time, could workaround realtime updates to the collection but adds complexity
- Build out the PDF in a form and use workflow to overwrite the original PDF
- Complex to pre-fill the form with PDF data, doable but definitely the most complex of the options
- Users cannot view the form directly in the repository so they would see the PDF and then need to edit it in a form
- This probably makes option 1 or 2 more accessible if this is what they have to do anyway
If the PDF is a part of a larger process and has a lifecycle, i.e., can only have notes added during some active time frame, you could use option 3 where form fields create/recreate the PDF on any submission