In older Acrobat versions, the stamp tool is accessed through the Comments menu, the Tools menu and the Commenting and Markup toolbar. In previous versions, nearly the entire Acrobat feature-set was provided through menu items, with toolbar buttons used as a convenient shortcut to the menu items (Figure 1). Using them in Acrobat X is just a little different. For the most part, stamps have not changed since Acrobat 5. When the developers at Adobe designed the stamp functionality, they got it right the first time out of the box. If you’ve already been using stamps in previous versions of Acrobat, you know what I’m talking about and so your first impression of Acrobat X may have been, “Ack!! Where are my stamps?” The user interface changes in Acrobat X are dramatic, but don’t let the fancy UI update distract you. No other PDF feature provides the same combination of ease-of-use, scope of usability and flexibility for marking-up an existing document. But this one simple feature is, in my opinion, one of the most important and useful Acrobat/PDF features of all time. A PDF stamp is, for the most part, just a custom (user-defined) graphic that can be applied to a document.

Acrobat x standard