The paper automatically generates a table of contents, but what if the table of contents is incomplete? Ask the great god to help, and go tonight.
There is a directory level before inserting a directory. You have to brush the place where you want to generate the directory according to 1, 2, 3 levels to confirm, so that you can reinsert the directory. For example, you select a paragraph first, and then click the 1 level directory. . . . . . . etc