HTML can use six different levels of headings to define the hierarchical structure of paragraphs in a document:
| Tag | Visual Effect |
| H1 | Test |
| H2 | Test |
| H3 | Test |
| H4 | Test |
| H5 | Test |
| H6 | Test |
The following attributes are placed within structure tags so that the HTML elements can be displayed in specific places:
| Attribute | Value | Visual Effect |
| ALIGN | LEFT RIGHT CENTER JUSTIFY |
Left-aligned text Right-aligned text centred text Justified text |
| NOWRAP | Prevents the browser from creating a line break. | |
| ID | Gives the tag an identification. This attribute is especially useful for programming with JavaScript | |
| LANG | Specifies a different language | |
| CLASS | Assigns a class to the contents (for style sheets) | |
| CLEAR | Used when text is surrounding an image. It brings the text as far down on the page as needed in order to have a clear margin. |
Here is an example header:
<H1 ALIGN=JUSTIFY> Justified text </H1>
