Thank you for your post.
The webviewer interface will only display the image; not the Comment and Markup tools from a shared server.
Please post this information into our FileMaker Suggestion web form at:
Although I could copy your post and paste it into the form, there are additional questions asked that only you can answer. When entering the request, please don't just say "Please add this feature." Give a little explanation of what you are trying to accomplish, and the why this is important for you. From past experience, I have seen more attention given to those requests that have real-life examples.