If you have subscribed to a channel or a hub but now would like to unsubscribe, follow the steps below:
- go to the list of channels / hubs on the left of your screen,
- click on the 'signal' icon next to the channel or hub from which you would like to unsubscribe.
- You will see a pop up message asking you to confirm.
- Click 'ok' and you're set.
(note: If you are an admin of a hub you can leave the hub this way. However, you can't leave a channel in a hub of which you are an admin).