Add Topic is a page where you can add a new topic with an image (optional), and select the Category and Topic Type (Public, Draft, Private). You may also make any public graph you have authored private using the private button. You may invite friends or groups using the Invite button below the diagram listing on your "My Private topics", or "My Public topics", or "My Draft topics". Friends may be invited either by supplying an email address or a TruthSift username. They will receive an email invitation to participate with a link. You may specify either "View Only" or "Edit" access. If you want to repeatedly invite a group, you may create groups on your "My Groups" page. Individuals who haven't been invited to a private diagram will not be able to see it.