You can make track changes in PPT 2010 but not in 2007. Suppose you have 2 presentations PPT A and PPT B where changes have been made in PPT B. 1. Open PPT A and select Review tab, Compare.2. Select and open PPT B. 3.The changes appear as Markup and a Reviewing pane appears on the right of the screen displaying PPT B as a slide or you can see the detailed changes.uppose you have 2 presentations PPT A and PPT B where changes have been made in PPT B. 1. Open PPT A and select Review tab, Compare. 2. Select and open PPT B. 3. The changes appear as Markup and a Reviewing pane appears on the right of the screen displaying PPT B as a slide or you can see the detailed changes.