How to set Default CSS Settings in HTML <sub> Tag

Most browsers will display the <sub> element with the following default values.

index.html

Example: HTML

<!DOCTYPE html>
<html>
<head>
<style>
sub {
  vertical-align: sub;
  font-size: smaller;
}
</style>
</head>
<body>

<p>A sub element is displayed like this:</p>

<p>This text contains <sub>subscript text</sub></p>

<p>Change the default CSS settings to see the effect.</p>

</body>
</html>

Output should be:

Type:	html
Category:	Web Tutorial
Sub Category:	HTML Tag
Uploaded by:	Admin