Cycore Cult3D for Acrobat, a free plug-in for Adobe Acrobat 4.0 or greater. This plug-in will allow users to insert and interact with three dimensional (3D) object images in Adobe Acrobat files. Users can spin and zoom an object, such as a CD player, to view it from any perspective, open and close different compartments, and listen to music or voice sound files. The additional file size to an Adobe Acrobat document is usually quite small--between 30 and 300 kilobytes, depending on the complexity of the Cult3D object.
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.