Right below the message box on your channel, you'll see a few options to adjust your message text. You have the option of bolding, italics, or even
This is what the options below your message box will look like:
To use these items, highlight the part of your text that you want to change and then press the related button.
You can also edit your message to include these options even after you've sent it.
B = bold
i = italics
S = strikethrough
</> = inline code
curved arrow: presses the "return" key to add a new paragraph to your message
$$KaTeX$$ = send math equations.