With each successive version, there are more features that you can -- and in some cases need to -- add to your PDF documents in Acrobat before they can be considered ready for archival, distribution or sale. That's great, but what happens if you make a mistake? Luckily, Acrobat boasts Undo and Redo functions similar to those of word-processing applications such as Microsoft Word to make life just that little bit easier.
Here's how to use them:
To Undo the previous command or action, simply hold Ctrl + Z. This can be performed multiple times.
To Redo the command or action that you have just undone, hold Ctrl + Y. This can also be performed multiple times, but not more than the number of actions that have been undone.
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.