From the Edit Channel page, Owners have the ability to modify the channel's name and visibility, as well as manage the channel content.
To modify the channel name, simply click in the channel name text box and enter the desired name.
To make a channel available to users, click on the "Hidden" toggle in the top left of the channel row to change it to "Active." Clicking the toggle again will have the opposite effect and switch the visibility to "Hidden."
To add content to the channel, start typing a search term into the search bar and then click the "Add" button to add the content to the channel. Once you have content saved to the channel, you can use the drag and drop feature in the bottom half of the page to re-order the channel content or click the "x" button to remove it from the channel.