You should define all the sections you need in your template. Each section is separated by a section break and has its own page setup. The table of contents and index often have multiple section breaks to customize the page layout in those sections and correctly generate the lists based on field codes. You need to be careful when working around section breaks. If you delete a section break, the page layout for the section, including the headers and footers, may be changed.

In the headers and footers, use field codes to display the contents of a specific style from the associated section, such as the Title style from the title page to include the book title in the footer. This type of field code is automatically maintained and updated. If you use a variable field code in the headers or footers, you need to manually update those field codes. Variable field codes in headers and footers are not updated automatically with the rest of the document content.