Batch Watermark PDF File by A-PDF Watermark

From: http://a-pdf.com/faq/need-to-figure-out-how-to-add-a-pdf-watermark-to-pdf-file-with-a-pdf-watermark.htm

Then let’s move to figure out how to add PDF watermark into PDF file with A-PDF Watermark. Learn more: http://a-pdf.com/watermark/index.htm