Adding a picture

In the message line, type: <img src="

then the URL of the picture, followed by ">

For example, try this:

<img src="http://www.w3.org/Icons/coffee-48.png">

Adding a web link

In the message line, type: <a href="

then the URL of the link, followed by ">

Followed by the site name, followed by </a>

For example, try this:

<a href="http://news.bbc.co.uk/onthisday">BBC ON THIS DAY | Front Page</a>

My thanks to Alfred (Awful Punster) for this information.