1.Previous
3.Next

BBC Text also enabled channel association, the ability for the user to retain their selected television channel visible in one section of the screen whilst viewing the text service, in contrast to Ceefax, which could only be viewed as a full-screen display, or as a semitransparent overlay (i.e. opaque blocks of colour on top of the television channel, with the black background now transparent; not 'translucent blocks of colour with a translucent black background') above the television picture. The original text service had no return path, this

1.Previous
3.Next