Tag

Headings

In an accessible PDF, heading tags are used to establish the document’s structure and hierarchy. They play a crucial role in organizing content, enabling both visual readers and assistive technologies, like screen readers, to navigate and understand the document effectively.

1. Purpose of Heading Tags:

  • Designation of Structure: Heading tags define the hierarchy and logical structure of the document, helping to break content into manageable sections.
  • Assistive Navigation: Screen readers use heading tags to allow users to jump directly to specific sections.
  • Heading tags exist directly below the <Sect> (Section) tag, grouping them with the content of their respective sections.

2. Hierarchy of Heading Tags:

  • Levels: The tags range from <H1> to <H6>, with <H1> being the highest (most important) level and <H6> the lowest.
  • Usage:
    • <H1>: Typically used for the document title or primary section heading.
    • <H2>, <H3>, etc.: Used for subsections, sub-subsections, and so on.

3. Best Practices for Heading Tags:

  • Use Tags in Order: Maintain a logical and sequential heading hierarchy (e.g., <H1> followed by <H2>, <H3>, etc.). Avoid skipping levels (e.g., <H1> to <H3> directly).
  • Ensure Accuracy: Verify that the heading text reflects the section and importance of the content appropriately.

On this page

  • Right-click on the Document tag
  • Select “New Tag”
  • Choose “Heading Level 1”
  • Make sure it is nested inside the Document Tag

Properly tagged headings (<H1> to <H6>) allow screen readers to recognize the document’s hierarchy, enabling users to jump between sections efficiently. Screen readers provide shortcuts for heading navigation—for instance, in NVDA, users can press H to move to the next heading or 1-6 to navigate by specific heading levels. A well-structured heading system improves readability, accessibility, and user experience, ensuring that all users, including those with visual impairments, can access information quickly and logically.


Keyboard Shortcuts

Headings (<H1> to <H6>)

  • Navigate by heading: H (next heading) / Shift+H (previous heading)
  • Move to next heading at a specific level: 1-6 (e.g., 2 for H2, Shift+2 for previous H2)
  • List all headings: NVDA+F7 (then select “Headings” tab)

On this page

Keyboard Shortcuts

Heading tags, such as <H1>, <H2>, and <H3>, are essential for meeting accessibility norms in PDF/UA ISO 14289-1. They ensure a clear semantic structure, maintain a logical reading order, enable navigation support, and optimize screen reader functionality. Proper use of headings ensures users can navigate and understand content efficiently while meeting the required standards for accessibility.

Accessibility norms in PDF/UA ISO 14289-1
Reference Description Purpose and Results
PDF/UA §7.4, EN 301 549 §10.2.4.6 Headings must be tagged appropriately using <H1> , <H2>, etc., based on their hierarchy.

Purpose: Provides a clear document structure for assistive technologies.

Result: Users can understand the hierarchy of content.
PDF/UA §7.4.1, EN 301 549 §10.1.3.2 Heading tags must follow a logical, hierarchical order.

Purpose: Ensures readers and screen readers navigate the document correctly.

Result: Smooth reading flow and clear organization.
PDF/UA §7.17, EN 301 549 §10.2.4.2 Headings must serve as navigation points (e.g., bookmarks or table of contents).

Purpose: Helps users locate sections quickly.

Result: Improves efficiency for all users, including those using assistive tools.
PDF/UA §7.4.2, EN 301 549 §10.1.3.1 Properly tagged headings enable assistive technologies to skip sections or jump to key content.

Purpose: Improves accessibility and navigation for screen reader users.

Result: Faster and more intuitive content access.