Word document defines the automatic numbering

First of all different levels of a title by title, Title II, Title 3 and so on to set the way you want.

Then, at the beginning - define the format required> to define a new multilevel list -> multilevel list.

 

 For example, a title is defined as the first chapter subheadings is defined as the first section, similar, at all levels can be defined. Reference may also be provided wherein the content, format.

References:

https://wenku.baidu.com/view/7dcb84e5ee06eff9aef807da.html