Is there a way to customize the box to request a signature?
Thanks in advance
I have approved the feature request. I have updated your Telerik points as well.
I have checked this and now there is no way to change or customize the dialogs. You can only disable them:
radPdfViewer1.PdfViewerElement.AllowSignSignatureDialog = false;
radPdfViewer1.PdfViewerElement.AllowSignatureDialog = false;
Let me know if you have any other questions.