# Document outline

The hierarchy of sections and headings that organizes a document's content.

## What is **Document outline**?

**Document outline** — The hierarchy of sections and headings that organizes a document's content.

Level: Apprentice · [More HTML terms at this level](https://www.ask-codey.com/glossary/subjects/html/apprentice)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/document-outline