I just reinstalled Windows and then Thunderbird. I'm getting the list of messages but no message preview pane as I'm accustomed to. I found out I can hit the F8 and turn it on/off, but it appears to the side. I like it underneath the message list. I see instructions to click on the "View" to set it up, but I cannot find where this alleged "View" menu item is. I've tried to find it in Settings with no success. Please help me get my message preview pane back as it was in the bottom portion of the screen.

Thanks