Change record status: 
Project: 
Introduced in branch: 
10.2.x
Introduced in version: 
10.2.3
Description: 

According to best practices for accessibility, Techniques for WCAG 2.0: organizing a Page Using headings, sections should begin with an h2 and subsections an h3.

The documentation for the Help page includes the following new Heading section.

Headings

Use an h2 element to indicate major sections of your help page.
Should your sections contain subsections, Use an h3 element to indicate each subsection.
Do not skip heading levels. An h2 should be followed by another h2, or an h3.

The Help Topic Syntax Example has be updated with the new heading structure.

This is implemented in #3414263: Change help headings for WCAG 2.0

Impacts: 
Module developers
Themers