Accessibility Concepts: Structural Hierarchy and Headings

Why Headings Matter

Headings do more than make text look big — they create the structural skeleton of a document. Screen reader users navigate by headings the way sighted users scan a page visually. They can pull up a list of all headings and jump directly to the section they need.

⚡ Quick Rules

  • One H1 per document
  • Don't skip heading levels
  • Use real heading styles, not visual formatting
  • Use built-in list tools, not manual bullets or numbers

When you use real heading styles instead of just making text bigger and bolder, you:

  • Give screen reader users a navigable outline of your document
  • Create an automatic table of contents in Word and PDF
  • Improve readability for everyone

How Headings Work

Headings follow a hierarchical structure, just like an outline:

Heading LevelWhen to Use It
Heading 1 (H1)The document title — one per page or document
Heading 2 (H2)Major sections
Heading 3 (H3)Sub-sections within an H2
Heading 4 (H4)Sub-sections within an H3 (use sparingly)

Rules

  • One H1 per document — the title
  • Don't skip levels — don't jump from H1 to H3 (H1 → H2 → H3)
  • Use heading styles, not visual formatting — bold + large font is not a heading

Common Mistakes

❌ Mistake✅ Correct Approach
Using bold or large font instead of heading stylesApply Heading 1, Heading 2, etc. from the Styles pane
Using headings just for visual appearanceUse headings for structure; use styles for appearance
Skipping heading levels (H1 → H3)Always go in order: H1 → H2 → H3
Multiple H1s in one documentOne H1 only — use H2 for major sections
Using all-caps or colored text to indicate a headingApply the actual heading style

Document Structure Beyond Headings

Lists

Always use the built-in list tools in your application — never type bullets (•) or numbers manually. Built-in lists tell screen readers "this is a list with X items," which helps users understand the content structure.

❌ Don't✅ Do
Type "• Item 1, • Item 2"Use the Bullets button in Word/Drupal
Type "1. First, 2. Second"Use the Numbering button in Word/Drupal

Paragraphs and Spacing

  • Use real paragraph styles, not multiple line breaks (Enter/Return) for spacing
  • Use the spacing/paragraph settings in your tool to control space between paragraphs

Columns and Layout

  • Use built-in column tools, not tabs or spaces to simulate columns
  • Use text boxes sparingly — they can cause reading order issues (see Reading Order)

Accessibility Checkers

Word, PowerPoint, and Adobe Acrobat all have built-in accessibility checkers that flag heading issues. See the Guides section for tool-specific steps.

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