HTML has six levels of headings, numbered 1 through 6, with 1 being
the most prominent. Headings are displayed in larger and/or bolder
fonts than normal body text. The first heading in each document should
be tagged <H1>.
The syntax of the heading element is:
<Hy>Text of heading
</Hy>
where y is a number between 1 and 6 specifying the level
of the heading.
Do not skip levels of headings in your document. For example, don't
start with a level-one heading (<H1>) and then next use a level-three (<H3>)
heading.
Example:
| <H1> |
Header Size 1 |
| <H2> |
Header Size 2 |
| <H3> |
Header Size 3 |
| <H4> |
Header Size 4 |
| <H5> |
Header Size 5 |
| <H6> |
Header Size 6 |
