Images can not be uploaded here, but you can "point" to and show any image on the internet - such as an account you set up at Photobucket (to store your own images).
When you click Reply or Post new Topic a new screen comes up with some button above the box where you would type. It starts with a B button (for bold)

, and then an I Button (for Italic)

followed by a U Button (for Underline)

. If you point at those buttons and don't move the mouse, some alt text should appear telling you what each one is. When you click on a button, it inserts text into your reply/new post.
When you click the mountains with the sun button (aka Image)

, it simply adds the following text (called tags):
![forum image]()
and in between those image tags you would post your image web address. Example:

You can also high-light text (by "dragging" your mouse across the text) and then click a button as well. That will put the tags on each end of the high-lighted text.
So, as you use this forum more and more, you will learn these tags and eventually you won't need the buttons. The above "code" was used by clicking the 5th button.
-Dennis