Making calls in Discord is easy. Just find the person you want to call. You can right-click on their name then click Call, or you can go to your message history with them and find call options above your conversation. Next to those options, you’ll also see the option to add friends to the DM. This will create a new private chat room and add them to any calls you make in that chat room. To leave the call, just hit the big red Leave Call button.
