When I tried this with no folders selected, absolutely *nothing*
happened -- nothing got synchronized. And I see that the instructions
for Download/Sync say "IF [emphasis mine] you have already selected
folders or newsgroups for offline use you can download and/or synch them
now." So apparently you must have something selected in order to even
begin synching.
So I selected Inbox, since it only has a few messages in it. Then I
clicked download/synch.
Despite the fact that I had UNchecked "keep messages on on this
computer", the body was *still* downloaded, as evidenced by the fact
that I could successfully search on the Body of the message.
But I realized that I had already *looked* at all messages in Inbox, and
to look at them, the body must be downloaded. So I sent a *new* message
and searched it *before* looking at it ... and the Body was still
searchable.
Then I realized that, because I had sent it *from* the same gmail
account I was sending it *to*, presumably they were the same message in
gmail IMAP's eyes, and therefore the Body was already present from when
I sent it. So I sent a new e-mail from a completely unconnected
account, and didn't send it from TB ... and its Body was *still*
searchable before being looked at.
In fact, I tried that once more -- sent an e-mail from an unrelated
account, and didn't even hit download/synch this time ... and its body
was *still* searchable the instant it showed up in Inbox.
So either there is something I am completely misunderstanding, or TB
*is* downloading the body ... without even being prompted to do so.
(BTW, how do I check in the profile to see if the Body is downloaded or
not? Just to check my suspicion that the Body *is* being downloaded.)