Also, if your picture is wider than what we think is appropriate for the forum, it will resize it within the window and allow you to click on it in order to see the full image.
Below, the first picture is done as just the attach button. You will se it only shows it as the thumnail version. The second one is done with the image button and you see it at full size. I uploaded a larger version and put it as the 3rd pic and you will see that it's been resized.
