PenOp brings signature capabilities to Adobe Acrobat 3 by adding signing capabilities to Acrobat Exchange. Adobe Portable Document Format (PDF) is a de facto standard for the electronic distribution of forms and documents. The PenOp Adobe Acrobat Plug-in enhances PDF documents by allowing users of Acrobat Reader to view signatures and users of Acrobat Exchange to sign them with a handwritten signature. Since Adobe Acrobat is a generic document viewer that accepts source documents in a wide range of electronic formats and from paper, the PenOp Adobe Acrobat Plug-in can be used to sign any document.
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.