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Chapter 9. Retrievability > Use an appropriate level of detail in the table of ...

Use an appropriate level of detail in the table of contents

Information is often subdivided to many levels, with headings for each subdivision. Such a structure is useful to show a hierarchy of topics, but you do not need to include every heading of every subdivision in the table of contents. This practice usually produces a long table of contents that makes general subjects harder to find, and hides rather than reveals the organization of the information. A table of contents should provide more than the highest level of headings, but allow users to easily see the top-level hierarchy.

For Web documents such as PDF files that display the contents in a separate, scrollable frame, using expandable sections gives you the flexibility of including the lowest level of headings. Users can see at a glance the top-level headings, and choose to see lower-level headings.


  

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