"Martin" wrote
Can anybody explain why Google groups inserts
"Hide quoted text -
Show quoted text -" ?

I don't post via Google but often use the archive to check for past
threads or particular answers. Isn't the hide/show just for choice? You
can click on the 'show' so it reveals the whole message as written, with
the parts of the previous message that the poster quoted, or hide the
quotes if you prefer. I think it's just to save screen space.

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Sue