I use Word 2003.

You can turn the tracking on and off and markups display on and off, separately and individually from each other. The status of tracking is displayed in the status bar, and there is also a word command that turns the tracking on and off that you can place on the tool bar as a button. When you place the tracking command as a button on the tool bar, it becomes a switch that displays the current status of tracking.

Is there also a word command that turns markup display on and off that I can also place as a button on the tool bar? Tracking status can be checked on the status bar even without a button, so a switch in the form of a button for markup display would be even more necessary.