Shoutbox

In the same way you change the color and style of text in a conversation: by using the tag [c=color][/c], [i][/i], etc inside your personal message.

But note that you will not see the color and style, but you will see the tags. Your contacts, provided they have Plus! Live of course, will see the color and style though.

To check how it would look like, you could add yourself to your own contact list.