I really don't know how you set these numbers. I suggest you choose the title style you need, and set the font size and other formats in the style of the formatting toolbar. For example, if you select it before or after entering the first chapter, select the title 1 in the style (here you can set the font size, whether it is bold, centered, etc.). , the same below, as in the first chapter of this case). For 1. 1, select heading 3 in the style (these depend on whether the style in your machine meets your requirements), and select 1. 1 as heading 4 and 1.2 as heading 3 in the style. . . The second chapter is selected as the title 1 (same as the first chapter), 2. 1 as the title 3, 2.2 as the title 3, 2.2. 1 as the title 4, indicating the title style corresponding to the first chapter. In this way, it will be very simple to make a table of contents in the end. After the contents are updated, you can update the table of contents (don't worry about page number errors). You can quickly reach the page referred to in the table of contents by clicking the title with CTRL+, and you don't have to worry about page number alignment. This is very useful for DIY typesetting of graduation thesis, as long as you set all the titles as I said above, and insert-quote-index and table of contents. I'm just giving a simple example here, and I believe you can master it through operation. . . .