Bibby wrote:
> Hi,
>
> If you subscribe some mail lists, you will receive lots of mails. But
> some times they are expanded (Maybe user expanded them), how can i
> collapse them all?
>
> I use Lotus Notes in office, it provide these two buttons, it's great.
>
> Thanks very much.
(Don't you mean posting to mozilla.dev.apps.thunderbird instead?)
This feature already exists: View->Threads->{Expand, Collapse} all
Threads, with shortcuts * and \ respectively.