E-Sticker is a great tool for Adobe Acrobat which can help you easily add exhibit stickers to PDFs which look just like the stickers used by deposition reporters and paralegals at trial. See: https://exhibitsticker.com/ .
A free version is available. After it's installed, it will be added with the stamp tool in the annotations for Adobe Acrobat XI.
When the sticker is selected you will be prompted to enter an exhibit number in a dialog box.
The sticker can be positioned anywhere on a page.
When you don't have a license for Trial Director or another program that can bulk sticker PDFs, even the free version of E-Sticker can come in very handy.
The paid version of E-Sticker will automatically advance to the next number, and includes an array of additional options.