Historically, Red Button and BBCi have generated the most content for sports, news, business and other non-fiction programming. Some are video based and can be optionally viewed as a picture-in-picture display, or simply chosen as a regular, full-screen channel would be. Some of these channels are text-based and generally remain displayed over the main programme being watched.
This drops a menu in a box over the programme being watched, allowing a viewer to pick from a variety of different "channels".
The name "Red Button" derives from the fact that viewers access it by pushing an actual red button on the remote control.
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