Press CTRL+ALT+V to enable the admin menu, typically only useable by Lindens, and SIM owners. However enabling this allows you to locate anyone on the map, and send teleport requests to people who are not on your friends list.
Debug mode
Press [Ctrl] + [Alt] + D during game play to unlock the debug mode menu, with options for wireframe mode or viewing invisible objects Repeat the code to disable debug mode.