js canvas - pdf

purpose is to edit a pdf editing script so files downloaded will have all annotations added to the downloaded files - see [login to view URL] this is the script then when clicked on a file like [login to view URL] we can add annotations, it's working fine - task is that when clicked on the "download" button at the top-right then all annotations added should be included on the file (right now annotations are not added) some ressources: [login to view URL] [login to view URL]