1) Modify the format of the heading style. Usually, the title style built into Word does not meet the requirements of the paper format and needs to be modified manually. Click Format | Styles on the menu bar, select All Styles from the list drop-down box, click the corresponding heading style, and then click Change. Modifiable contents include font, paragraph, tab stop, number, etc. The format of the title 1-3 is modified according to the requirements of the paper format. 2) Apply the corresponding format to the title paragraph of each chapter. The title of the chapter is "Title 1", the title of the section is "Title 2" and the title of the third level is "Title 3". Another advantage of using styles to format titles is that it is very convenient to change the title format. If you want to change the font size of all the first-level titles to small three, you only need to change the format setting of the "title 1" style and then update it automatically. The font size of all chapters will be changed to small three, which is troublesome and easy to make mistakes without manual modification. For information about how to apply styles and automatically update styles, see Word Help. 3) Extract the directory. According to the requirements of the paper format, the table of contents is placed in front of the text. Insert a new page before the text (insert a page break before the title of the first chapter), move the cursor to the beginning of the new page, add the word "table of contents" and set the format. For a new paragraph, select Insert | Index and Table of Contents in the menu bar, click the Table of Contents tab, and the display level is level 3. Don't change anything else. After confirmation, Word will automatically generate the table of contents. If a chapter title is not in the directory, it must be that the title style is not used or used improperly, and there is something wrong with the directory generation, not Word. Please go to the corresponding chapter to check. After that, if the chapter title changes or the page number changes, just update the table of contents.