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It would be extremely helpful to have the ability to download a PDF (or image, or other file types) with comments included. Alternatively, could there be a way save out just the comments as it's own ...
YES. +1 to API endpoint as well. Comments need to integrate with productivity apps too, to show up as to-do lists/action items that can be assigned, tracked and calendared. Asana, Notion, Sunsama, Todoist, etc