To undo the last action you did with the document's content, use one of the following methods:
–On the Home tab, in the Edit group, click
Undo.
–When working in macOS, run the 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.
To redo an undone action, use one of the following methods:
–On the Home tab, in the Edit group, click
Redo.
–When working in macOS, run the Edit > Redo command from the command menu.
–Press Ctrl+Y, Ctrl+Shift+Z, Shift+Alt+Backspace (Windows, Linux) or ⌘Cmd+Y (macOS).
To redo the last few undone actions, run the redo command several times.