Thare are several options. See PdfSignatureAppearance.getLayer(2) to have full 
control or PdfSignatureAppearance.setAcro6Layers(true) together with 
PdfSignatureAppearance.setRenderingMode() to use some predefined combinations 
of text and image.

Paulo

________________________________
From: jian zhang [mailto:rodge...@gmail.com]
Sent: Thursday, October 21, 2010 6:06 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] How to add a signature in a pdf with a personalized 
image appearance?

Hi,
Could you please  give me a sample code about how to add a signature with a 
image.
just like the picture attached.

--
Best Regards,
张健


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