Manage TV Channels
Any time you need to edit some aspects of your television channels, you run Manage Channels tool.
The Manage Channels tool is accessed via MC's Television property page.
To start television property page, go to MC's Standard View and click Television on the left panel, and then click the "TV Options..." button near lower center of the main MC window. Alternatively you can also use Tools menu and select Options... to start MC's property pages and then click Television on the left panel. Once you opened Television property page, click "Manage Channels" in the "Channels" section.
Here is what you get: