To see only Pilar's changes, you can temporarily hide the information you don't want to review right now (Richard's and Kai's revisions).
On the Review tab, in the Tracking group, click the arrow next to Show Markup, point to Reviewers, and clear the check box next to All Reviewers. That hides everyone's markup.
Then click the arrow next to Show Markup again, point to Reviewers, and click the check box next to Pilar's name to select it. That reveals Pilar's revisions and comments. You can accept or reject her revisions and delete her comments as you read through them, or you can do this later on.
When you are done, show the other reviewers' changes by clicking Show Markup again, and then clicking All Reviewers.
Click Play to see how to use the Show Markup menu.
A note of caution Clearing the check boxes on the Show Markup menu does not delete markup. It just temporarily hides it. You'll learn more about this later in the lesson.