BuddyPress.org

Hello, I would need some help with several problems that I can not perform, could you give me some code to be able to insert a new tab with subnav? The second problem I have is that I want to insert the login menu as they have here in the Buddypress website, I can put the menu where the user name, notifications, profile, disconnect, etc … that would put it in The menu for all users, how could you do that? Greetings and thank you.