Note: You need to have an image available located somewhere else on the Internet. You are not able to upload an image to our hosting/server to post it here.
Once you have an image then simply reference the url of the image within the following bb code tags
[IMG ]http://www .thedomain.com/images/yourimage.jpg[/IMG ]
An example ...
[IMG ]http ://www.smallbusinessbrief.com/grafx/puppysittingwhitebg93x120 .gif[/IMG]
You can test with the above here if you want to practice or let me know if you need any more help. We're always around to help you with using the forum.