Open the control panel and select "Set Up Relaying" to create a middle relay. Select the "Relay traffic for the Tor network" option to start your own middle relay, then give your relay a nickname for easy identification, enable automatic port forwarding and disable access to all Internet resources in the "Exit Policies" menu to ensure your PC will only be used as a middle relay and not an exit relay. Finally, just hit the "Start Tor" button to get your relay going and join thousands of volunteers across the globe working to keep the Internet private.