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Horizontal rules

Use a triple hyphen --- on a new line to represent a horizontal rule.

Use horizontal rules after each complete component parameter.

Always use horizontal rules before a Heading 2.

Use common sense to determine whether a horizontal rule is required before a Heading 3. For example, if you're producing text for in-app contextual help and wish to properly delineate a new section.


Always insert a newline before and after a horizontal rule.


Do not end a page with a horizontal rule. The final section on a page can skip the horizontal rule.