To include an image in your message:
1. Post your image somewhere on the internet.
2. Using the full HTTP reference to your image, include the following text in your message in Pigeon-Talk.
[IMG]
http://yourfullurl/yourimage.jpg [/IMG]
Note: Be sure there aren't any spaces between your link and the [img] tags.
An ideal image size for a post is no larger than 400 pixels square. Larger images only serve to slow everyone down.
If you upload images to a post, be sure they are JPEG images and are no larger than 400 X 400 pixels. Users are limited in the total size of content they attach to posts. Keep content size down and there is plenty of room to post. If you exceed your attachment quota, you can prune and manage your earlier attachments in the User CP (Control Panel).