I found this, written by Patrice, and it works - I posted a trial pix, nice and big, easy to see!
How to post an image
1. You will need to be logged in to post an image on The Quilting Board, and you will need to have your Message Editor Interface setting in your General Settings set to Enhanced Interface - Full WYSIWYG Editing.
2. Once you are logged in, navigate to the forum discussion board or post you'd like to post and image in.
3. To post an image select the picture icon button next to the video icon button above your new post. You have the option to upload a file from your computer, or to insert a URL of an image file from the web.
4. When you are done uploading your image, you will see the image in your post. You can add a description for the image and other text.
5. Then, preview it to make sure everything looks good.
6. Finally, click on the Submit New Thread button to publish your post.