Like this?

Sorry for page stretch
Yeah, just like that!
Looking good.
Oh and if you want to resize your images without reducing quality, you can set a max width to the image.
[IMG width=500]http://i.imgur.com/SQjcsWy.png[/img]
Put the "width=500" part in the first img tag. You can also set height and width together, but that usually scales the image weird.
You also don't need to use 500, but thats normally a nice size for the forums.