Hit the “Preview” button at the top right to see what it will look like. Then close the preview page. Repeat if changes are are made.
When you post on the Forum, the website is set to auto-post links to Facebook and Twitter showing the first photo of the post. To prevent auto-posting, go to the bottom of the page and untick the auto-posting boxes.
When all is OK hit the “Publish” button top right, confirm publication details and it will then be posted.