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Suddenly remembered a thing old Daewoo CRT TV had, which I used when I was a kid.

On it's TV remote it had a set of unnamed buttons, four of them were coloured, others didn't. They were doing absolutely nothing, except only one that turned the whole image black with a line that had same colors, ordered the same way they were on the remote. I think it was some kind of menu, but the feature itself was missing?

So... what was that?
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@a1ba teletext did provide 4 colored areas which could change pages. With the same colored buttons on the remote.

Maybe it was translucent teletext? Or the button activated subtitles / closed captions? Often provided through teletext.

At least in Germany.

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@kura hm, that would explain. Maybe teletext wasn't provided on the cable TV. I don't remember if it did anything when connected to VHS or DVD player... or I never tried that.

Others in my family would rather prefer if I didn't touch these buttons because they didn't know what these do either and, sadly, weren't curious.
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@kura @coaxial I looked up how teletext looked and yep, that looks like it. The same black image with text on top, but I didn't had anything on it, and below the same coloured bar.
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