2. First set the chapter title format. Select the title of the first chapter, and select the title 1 style in Start-Style to see the format change of the title of the first chapter XXX.

3. Then, set some heading styles. Select the section title, and select the title 2 style in the same way, and you can see the format change of the section title.

4. At this point, select Insert Directory under Reference-Directory, and the directory option box will pop up.

5. In the directory option box, you can set the style of the directory, such as format, display level, introduction, etc. After the setting is completed, click OK.

6. You can see that a directory that conforms to our document structure is inserted into the document. The header and display level are also generated according to our settings.

7. Add the table of contents page title table of contents, and you can complete the table of contents addition of documents, which is extremely convenient and quick.