For Clear Linux* OS documentation that has three or more sections, use the contents:: directive as shown in the example below. This directive automatically captures the headings (and subheadings if used) as specified in the value given after :depth:. Adding this directive to longer documents allows users to quickly navigate to the desired section.
.. contents:: :local: :depth: 2
Assure that you add :local: as the value. For more resources on this directive, visit the reStruturedText Directives