This project has only one task.
Configure the document to force the tracking of changes. Require the entry of the password '789'' to stop tracking changes.
When Track Changes is on, deletions are marked with a strikethrough, and additions are marked with an underline. Different authors' changes are indicated with different colors.
When Track Changes is off, Word stops marking changes, but the colored underlines and strikethrough from your changes remain in the document until they're accepted or rejected.