Can eDoc or Pressero output/supply a JPG instead of a PDF to the client for digital delivery?

Pressero can have eDoc output a JPG proof file, but the production file will always be a PDF.  Note that this is a site setting found in Sites > [site name] > Settings > General tab in the Check out section.   So once you turn this on for the site, all of the templates/products using an eDoc template will output a JPG proof file.  However, the file that is digitally delivered is the production file - which will be a PDF.