There are a few different ways you can format your text in. Here are a few examples, plus the code you can use to do them:
<p><b>This text is bold</b></p>
This text is bold
<p><i>This text is italic</i></p>
This text is italic
<p>This is<sub> subscript</sub> and <sup>superscript</sup></p>
This is subscript and superscript
Here is a list of the different tags you use to format your text.
<b>
– Bold text
<strong>
– Important text
<i>
– Italic text
<em>
– Emphasized text
<mark>
– Marked text
<small>
– Small text
<del>
– Deleted text
<ins>
– Inserted text
<sub>
– Subscript text
<sup>
– Superscript text