You Can Undo After You Save
I am amazed how few people know this.
Way back in Office 2007 Microsoft changed the Undo List so that it is NOT cleared whenever you save a file.
You can use Ctrl + z or the Undo icon to undo things you did before you saved the file.
If you close the file that obviously clears the Undo List.
Please let people know this as I find so many people in my training sessions do not know things have changed since Office 2003.
This applies to all MS Office apps.