Hi Linda,
For Alexander-11283, you're already on the trusted list automatically because you are a Profile Manager for that person. If you click on the Privacy tab to the right of where it says "Samuel Alexander's Profile" and scroll down, you can see the Trusted List.
For the the profile, you click on the Privacy tab, scroll down to the trusted list and click on the link right below where it says "Join this List". It will take you to a form where you can ask and give details.