It would seem to follow logically that any program which can create annotations can also sign them.Īlas, I have no current access to a Linux box, but if you follow my logic, then give it a try. Read, create, sign, and annotate (comment on) PDF documents and fill It's a little late, since you accepted an answer last year -), but, I have always been a fan of FoxIt Pro.įrom my answer to Linux PDF reader that shows annotations:įoxIt pdf reader has a Linux version and say that it can Poppler themselves list a few projects that utilise Poppler too (seems a bit out of date though). To have most features requested, but not 100% sure about annotations. Zathura - plugin-based document viewer, includes two different PDF plugins (one is Poppler-based), Qpdfview - seems to have all features requested (not sure how extensive the annotation support is, but seems to depend on what version of Poppler you build it against). All are (or can be) based on the Poppler PDF library, which seems to have annotation support (since Poppler v0.20-ish). Some others I've not personally tried, but look like they suit your needs. A lot of the application's utility is in keeping a database of all the important metadata for citing the work, but if you ignore those features (assuming they're not what you're after) then it should at least do what you require in terms of highlighting, annotating, notes, retaining them after quitting, being actively developed, free and working on Ubuntu.

It's designed as a reference manager, and lets you store + annotate PDFs for academic research.

$ gpg -clearsign -output=sign_file.pdf file.It might be a slightly different intended use-case, but perhaps Mendeley would suit your needs. Recommended (options 3): In Ubuntu install apt-get install xournal as sign and sign all document by yours key.

Not recommended (options 2): long way to install w$ on and use the latest Abode Reader DC or try to use deb installation. Not recommended (options 1): use deb installation commercial Foxit or online solution.

Install foxit reader in ubuntu 20.04