In longer documents and for online content, a useful structure is to group chapters together in larger, overarching sections so that readers can quickly grasp the navigation.
These sections can be based on the types of information, the process or the audience.
For example, in a computer manual, you might have larger sections such as ‘Getting started’, ‘Entering data’, ‘Troubleshooting’, ‘Finalising your report’, and then smaller step-by-step subsections within the larger structure. In presenting health information, you might divide it into large sections for different audiences – ‘Patients’, ‘Healthcare practitioners’, ‘Managers’, ‘Researchers’ – and then have smaller subsections within those areas.