As you've learned, one of the main benefits of Word's Comments feature is that it prevents reviewers from cluttering up a document with text that must simply be deleted later. You can go beyond inviting reviewers to use Word's Comments feature. You can set up your document so that they can do nothing but make comments. Follow these steps:
Choose Tools, Protect Document. The Protect Document task pane opens (see Figure 26.13).
Figure 26.13. Using the Protect Document dialog box, you can prevent reviewers from doing anything except making comments.
Check the Allow Only This Type of Editing ...