Which feature will mark all formatting changes made to a document?

You can see who has been making changes in a document by turning on the track changes feature. When this feature is turned on, MS word will mark up new changes made to the document. Click on the review tab, tracking group and then select the track changes. 

If you would like to accept all formatting changes but not text, you will follow the same procedure and on the track changes option, you will click on show markup and then turn off all check marks apart from the formatting check mark.