HTML.

Note that headings automatically generate vertical spacing both above and below the heading.

<H1>...</H1>	Normal Heading 1 Normal
<H2>...</H2>	Normal Heading 2 Normal
<H3>...</H3>	Normal Heading 3 Normal
<H4>...</H4>	Normal Heading 4 Normal
<H5>...</H5>	Normal Heading 5 Normal
<H6>...</H6>	Normal Heading 6 Normal