You can undo the last action performed on the content of a document.
To do this, proceed with one of the following:
–On the Home tab, in the Edit group, click
Undo.
–When working in macOS, run Edit > Undo command from the command menu.
–Press Ctrl+Z or Alt+Backspace (Windows, Linux), or ⌘Cmd+Z (macOS).
To undo several recent actions, run the undo command several times.