Very basic functionality
Just bought this to add watermarks to company documents. It does not let you position the watermark at all. It plops it in the middle of the page, lets you resize it, lets you adjust transparency (alpha), and lets you rotate it. That’s it. I need to put water marks in unobtrusive positions depending on the document, plopping an image *on top of the document* (instead of under the document) is just not very practical at all. e.g. if you have white space in your logo, the white space will be seen on top of the document, making it look very cobbled together. Not very professional for image watermarks.
Connor Ferster about PDF Watermark, v1.06