1. Go to the "Live Stream" section.
2. Add a new channel by clicking the "Add channel" button (2.1) or choose the channel you want to edit and click on the "Settings" icon (2.2).
3. Make necessary changes by editing needed fields: paste the Stream Key or replace it if you've generated the new one, change the channel name, etc.
4. Click the "Edit channel" ("Add channel" for new channels) button once all needed changes are made.