2. Click View-Outline.

3. In the outline view, select the title to be set as the first-level title, and select level 1, as shown in the figure.

4. After setting the primary title, set the secondary and tertiary titles one by one. The method and steps are the same as above. Close the Outliner when the settings are complete.

5. Place the mouse in the insertion position and click Reference-Insert Directory.

6. Select the corresponding option in the directory dialog box that appears, and then click OK to insert the directory.

7. If you want to update the entire directory, right-click the directory and select Update Domain.

8. In the dialog box that appears, select the corresponding options as needed, and then click OK.