Sorry, this is probably a stupid question. I've just joined the mailing list, I read the welcome email and the about page, and can't find the answer to this. I configured myself to receive the message digests -- there's way too much volume on this list for anything else. I want to respond to a particular thread, though, and can't see how to do it easily. Is it just a matter of copying the subject line? Actually, I'm pretty sure it's not, because I see several cases of duplicate subjects which are separate threads. Thanks