You Can Undo After You Save
I amazed how many people are unaware of a change that happened way back in Excel 2007.
In Office 2007 and later versions you can use Undo after you have saved the file.
In the old days (Excel 2003 and earlier) saving used to clear the undo list – it no longer does.
So undo to your heart’s content.
Remember there is a keyboard shortcut to undo.
Ctrl + z