Display Markup
You can determine how much you wish to see in the
Reviewer's pane on the left side of your tracked document.
Try it: Show the Markup
Go to Review -> Tracking.
Select Show Markup.
What Do You See? The Markup menu has a check
mark for each topic that is displayed: Comments, Ink, Insertions and
Deletions and Formatting,
There is also an option for displaying the Markup
Area with a highlight.