Bold - <b>Bold</b>
OR
Strong - <strong>Strong</strong>
Italics - <i>Italics</i>
OR
Emphasize - <em>Emphasize</em>
Underline - <u>Underline</u>
Strike - <strike>Strike</strike>
Superscript = x5 - x<sup>5</sup>
Subscript = x5 - x<sub>5</sub>
Delete Insert - <del>Delete</del> <ins>Insert</ins>
Large - <big>Large</big>
Small - <small>Small</small>