You can use document protection to help restrict how others can change the formatting of your document.

  1. On the Review tab, in the Protect group, click Protect Document, and then click Restrict Formatting and Editing.

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  2. In the Protect Document task pane, under Formatting restrictions, select the Limit formatting to a selection of styles check box, and then click Settings to specify which styles others can apply or change.
  3. Under Styles, make sure that the Limit formatting to a selection of styles check box is selected.
  4. Select the check boxes next to the styles that you want to allow in the document.
  5. Under Formatting, select the check boxes next to the types of formatting that you want to allow or prevent.
  6. Click OK.
  7. If you receive a message stating that your document may contain formatting or styles that are not allowed, do one of the following:
    • Click Yes to remove styles and formatting that are not allowed - for example, styles that you did not select in the Formatting Restrictions dialog box.
    • Click No to keep the formatting or styles in the document. Note that users will not be able to use the styles or formatting when they edit the document.
  8. Under Start enforcement, click Yes, Start Enforcing Protection.
  9. To assign a password to the document so that only people who know the password can remove the protection, type a password in the Enter new password (optional) box, and then confirm the password.