Unless there is a simpler way, what you can do is click on the picture and save it on your computer. Then , assuming that you already have the desired look / cropped anything out / etc, you can then try and upload the file on tinypic or imgur and use the coding that Edol provided ~?
Glad that it worked ^^ & for reference, if you wanted the picture centered you can click the center that's for the text and insert the coding for the image and it should work. c: