You can use the Undo feature to reverse actions you take while working in a document, such as deleting or formatting text.
The Undo feature is particularly useful if you mistakenly delete text; when you use the Undo feature, you can recover the text.
Click the Undo icon ().
Word reverses the affects of the last change you made.
You can repeatedly click to reverse each action you have taken, from last to first.
You can press + to reverse an action.
If you decide not to reverse an action after clicking , click the Redo icon ().