Section 1 ... Title (1 level)

1. 1 ... Subtitle (Level 2)

Subtitle under 1. 1. 1- ... Subtitle (Level 3)

……

Section N ... Title (1 level)

No. 1 ... Subtitle (Level 2)

N. 1. 1- ... subtitles (level 3)

(This is in the column of common toolbar styles. Click on the small triangle symbol in the lower right corner, and the titles 1, 2 and 3 will come out. . . . . )

The second step is to insert the page number:

Insert/Page Number command, select the page number format in Format, select the starting page number as 0, and click OK.

At this point, the page number of the text is inserted. (Because that page of the table of contents exists alone, it doesn't need a page number, so it starts from 0. )

Step 3: Automatically generate the article directory:

Insert/Reference/Index and Directory Opens the Index Directory dialog box; Click the Directory tab in the dialog box, make relevant settings, and then click OK to automatically generate the article directory.