How To Toggle Folder Pan Open/Close?

Trying out EM Client, again, for about the 5th time.  However, this time it seems that they are close to filling my needs - primarily to get away from Thunderbird.  The one thing I cannot find, after a couple fo hours of digging through the online documentation and forums is simply this:

How does one toggle the folder pane open and close?  The only way I’ve found to do it so far is to drag it open then drag it closed.  I am using the messages on the right view, and I do not want the folder pane open by default, but would like an easier way to open and close it.

Thanks…

Hi Michael, 

I agree - they went halfway…All it needs is another arrow, when the folder pane is showing.
E.g.

       

Peter

Exactly!  I’d even settled for a hotkey toggle…