[Evolution] keyboard shortcut to expand/fold threads?

[peter <peter3484 gmail com>]

Hi,

In evolution, I could sort mails by thread.  That is great.  Is there a
keyboard shortcut to expand or fold a thread?  In thunderbird I can do
this by highlighing the thread and use the right/left arrow key to
expland/fold it.  I think it is a pretty standard shortcut for
treeviews.

thanks.