Thank you for your reply
But the feedback link you gave is about adding electronic signature, which is (a lot) more complex.
Here my question is only about viewing the signature.
Even free pdf viewer like pdfjs can show it, so it's quite strange that your so-complete viewer can't do that ?
Is it any work around we can do to show it in the viewer ? For example change pdf at runtime ?
Because this is a true blocking point for us, as we have that now with pdfjs and customer will not understand that we go backward...