Section-level Indexing
Section-level indexing allows you to include individual indexes for your sections. These new indexes follow the same format as the main bundle index and are included in the bundle at the start of each section where section-level indexing is enabled.
Enabling section-level indexing on your sections
The section-level index option will need to be enabled on each section individually.
To enable section-level indexing, you must first select the desired section in the sections pane and open the properties explorer.
With the properties explorer open and your section selected, you can see the section's properties. Here you will see a checkbox to enable the section-level index for your selected section.