My bosses like the idea of being able to add the annotations on the PDF Viewer. I pull my files from Azure and they want to mark them up. So, I'll need to save the updated copy back to Azure. How does this work? Do you have an example of how to keep the changes? Do the annotations become part of the PDF File or must I save those off separately in order to reapply them when I view? Or, can I just take the modified bytes and upload them as a new copy of the original file?