When you are entering your response into the text box, you will see a box with word-wrapped. Pull down on it and you will see the HTML feature. You can use the HTML feature to add a heading to your message, use the list UL command, etc. All the HTML features are available. You can also include hotwords, graphics and animation in your messages.
Caucus does the rest.
People reading your item or response can just click right on the URL and go where you send them. Sharing information is a great use of Caucus. Simply upload a file into your item or response, then post it just as you usually would. It's a lot easier than you might think.