Using Thunderbird, how do I get back to my In Box after looking at sent messages as I see now way or choice to do so? I am a Mozilla financial contributor. Please advise as I cannot do so which makes Thunderbird useless to me. I see all of my send messages near the top of the screen which I can select to look at, but no way to get to my In Box. Shutting down and re-opening Thunderbird takes me to the same screen before I closed it.