This information is taken from the same 'Knowledge Base' that the other links sent you to.....
If you wish to make your signature logo into a clickable link...
- Return to the editor box.
- Highlight the text [SIGPIC][/SIGPIC]
- Click on the Insert Link icon (arrowed below) near the top of the editor.
- Enter the destination URL into the dialogue box that appears.
- Click the OK button.