This screen allows you to create a new channel from scratch.
It is accessible from the channels list screen.
The screen will just prompt you for a name and a description for your channel. When filled, just click on Create. The channel will then be created, and you will be redirected to the channel detail screen, so that you can edit all of its components.
The other method to create a channel is to search for an existing channel in the Reuse and save time zone.