>> It works for both.  You can press Command+S in the message-list for
>> senders to be outdented above.  For implementors, just highlight the
>> message in the code at the bottom and press Command+M.  You can even
>> select it "grossly" and there can even be intervening code in the
>> middle of a keyword message and it will still work!
>
> That bit? The selecting of a bunch of text around a keyword message?
> That impressed me no end. It _rocks_.

Oh I know, and I think Dan Ingalls is the one who originally
implemented it over a decade ago!