Open the WORD document. If the file has been entered, you can choose to enter the theme, click the style window on the left side of the font bar in the menu, select "theme 1", and select the font and font size; If you want to display the secondary theme in the table of contents, you should select "Theme 2" when entering the secondary theme. Where the title style is set, there is a small black square mark on the left. Automatic directory generation after file input: 1. Place the cursor on the directory you want to add. 2. Click "Insert/Index and Directory/Directory" and select the top level in the display level column to determine how many levels there are in the directory; Select the display page number, page number right alignment and dotted line style. 3. confirm. At this point, the directory has been generated in the location you specified. The font and spacing of the generated directory can still be adjusted directly in the directory.