I also discovered that it's pretty easy to add an image to a comment. It needs to be on the internet someplace and of course you need to have the right to use it... go and get the url of the image, not the page it's on. You do that by right-clicking on the image and opening it in a new tab and then taking that url. Here is a photo from a webpage on my blog about simple green living, and the page is about being an expat in Uruguay: