This paragraph (defined by the p tag) contains a lot of lines in the source code, but the browser ignores it.

This paragraph contains a lot of spaces in the source code, but the browser ignores it.

The number of lines in a paragraph depends on the size of your browser window. If you resize the browser window, the number of lines in this paragraph will change.

To break lines
in a
paragraph, use the br tag. This is &&&& ampersand

This is heading 1

This is heading 6

Use heading tags only for headings. Don't use them just to make something bold. Use other tags for that.

Heading aligned to the center

The heading above is aligned to the center of this page. The heading above is aligned to the center of this page. The heading above is aligned to the center of this page.

The hr tag defines a horizontal rule:

This is the end of my test page. See Shai CSS mail in commnts!