For anyone who might want to know even more about quoting (and multi-quoting), there's a tutorial on the subject here:
FAQ and Tutorial - Quoting and Multi-Quoting

I've never known how to multi-quote - thanks to Echoes, I've just figured it out.

To multi-quote just click on all the posts you want to quote and then when you click 'Add Reply' they are all there for you.

Cool!
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