Final answer:
To undo a change to the current field, press Ctrl + Z. This command is the universal shortcut to revert the last action in most software applications.
Step-by-step explanation:
To undo a change to the current field in a document or application, you should press Ctrl + Z once. This keyboard shortcut is commonly used across different software platforms to revert the last action taken. It is important to note that if you want to ensure that changes you make to a document will not be saved as edits, you should go to the tools ribbon, and toggle Track Changes to off. To see all the changes made, you can open a panel by clicking Reviewing or Reviewing Pane in the tools ribbon. If you need to navigate to a specific revision, you simply click the revision in this panel.