Hello Canvas Team,
I am a student primarily using Linux, and I recently found that the PDF downloaded from the feedback viewer loses all free-text annotations in my viewer (mostly poppler based). I have raised the issue with poppler at Cannot display free text annotation (#656) · Issues · poppler / poppler · GitLab and it seems that these annotations in the PDF generated by Canvas are missing a "DA" tag, which is required according to PDF spec 1.7.
I would like to have this problem fixed, to give us students the same experience with non-proprietary software and more freedom of our choices. But I also understand that it may not be that easy.
I'm looking forward to your opinions.