pdfMachine White is a free version of pdfMachine for producing great quality PDFs.
If an advanced feature is used, e.g. encryption, then a watermark is generated on each page. If you want to use an advanced feature without the watermark being generated then you must purchase and register the software.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.