HTML/CSS/Layout Attributes/leftmargin
"leftmargin" sets the left indented distance in pixels
<source lang="html4strict">
<html> <body leftmargin="100">The document has a left margin of 100px</body> </html>
</source>
<source lang="html4strict">
<html> <body leftmargin="100">The document has a left margin of 100px</body> </html>
</source>