You need Firebug for Firefox. Lets you edit HTML on a page using javascript. So I edited the HTML in the text box and put code in to display images . Alternatively, you could look for an online demo of "TinyMCE" (text editor). It's what they use but have disabled some of the buttons, but if you create something in the demo, you should be able to copy and paste it into their box and it should work. Pretty dodgy really. Means I could have tables, images, hell probably embed videos or iframes. Which could lead to people stealing cookies or sessions. And therefore hacking someone's account... Hmm...