1. Open the word document whose directory needs to be generated. 2. Select the first-level title. 3. Then click "Title I" under the toolbar "Start" and set it as the style of Title I. 4. Do the same for other first-level titles to get the following figure. 5. Select a sub-title. 6. Then click "Title II" under the toolbar "Start" and set it as the style of Title II. 7. Do the same for other secondary titles. 8. Move the mouse to the beginning of the document and click Contents in the toolbar Reference. 9. Select "Automatic Directory" in the next dialog box. 10. You can see the generated directory in the document.