How?
Show a specific type of change
Show changes and comments for specific reviewers
To select or clear all check boxes for all reviewers in the list, click All Reviewers.
Note Clicking Markup on the View menu will display or hide all markup (markup: Comments and tracked changes such as insertions, deletions, and formatting changes. View markup when you want to process tracked changes and comments. Print a document with markup to keep a record of changes made to a document.) from selected reviewers. When you display all markup, all types of markup will be selected on the Show menu.