Once you have chosen the Share option and have the URL with the PUB in it (not the CC in the middle. That's your copy that can be bookmarked on your computer.). Highlight the Pub URL, copy it and go back to the message board. Choose User Control Panel, then profile, then Edit Signature. Paste the URL in it. Add what you are feeding and what insulin you are using so we won't ask you each time. Then Submit.
If you have trouble, send me a pm and I will try to help.