Tim needs to print PDFs and add a common black space to custom print text in. Leo says that it's easy to do unless he wants it to automatically increment. If he's doing it manually, it's simple. Any PDF editor can do it. Leo likes PDF Forge. A good PDF tool will also have a rubber stamp signature that can be added. BlueBeam is used by the construction/design industry. Nitro Pro and FoxIt are also good solutions, but he shouldn't buy Adobe Acrobat. It's really expensive and doesn't do anything that the others do.