PDF Signature Field is invisible

Hello. I have a question about PDF Viewer. I was download both PDF Library and Viewer. First, I was Create a Signature on PDF. After that open the file using PDF Viewer. **But I can't see the Signature field in PDF Viewer sample that was signed using PDF Library.** Am i missing? or isn't it implemented yet? Thank you.

That feature "showing PDf signature" has not been implemented. We will consider adding that to our future release.