Simply click on the Profile link in the User Menu:
and then click My privacy settings near the top of the page:
Simply click on the Account icon and then Profile:
and then click My privacy settings:
On this page you will control who sees what on your Public Profile (more details on these profiles below). You can choose Everyone, Connections or No one for the following content:
You can also decide if your User Profile is discover-able on the Find Personal Connections page.