For when an artist has a Portable Document Format (PDF) available at their website. These documents are not uploadable to Danbooru, so add this tag whenever one is found.
For any questions about the following, ask in topic #14081.
Source the image post, link to the PDF otherwise
Both PDF and image are available separately
Upload the image
Set the source on Danbooru for the image (image or post link).
Add a comment with a link on where to get the PDF.
Only PDF is available
Convert the image to a usable image format, preferably PNG, and upload it.
Converted files should be in a lossless format like PNG unless it can't go under the 50 MB filesize limit even with optimization
Set the source on Danbooru for the PDF (file or post link).