10 years without having to log on here for help and I finally fcked it up and can't figure out how to fix this simple problem. I did go through all the step btw before I came here and watched several video and reinstalled TB but the problem still exists I open TB 1. the top is all the messages in my inbox along with new one filing in 2. usually there is a split screen. 3. I can see the messages at the top and then there is a dividing line 4. below that line it would say thunderbird or some such message. -important part- 5. when I click on the message the text of the message WOULD show in thE BOTTOM HALF OF THE split screen but that split screen is no longer ther when I click on the message I can not read it unless I dbl click the message into a new window - I DO NOT LIKE DOING THAT I LIKE THE MESSAGE SHOWING UP IN THE BOTTOM OF THE SPLIT SCREEN - so I can delete what I don't like quick NOW I went to stetting/general and did the defalt thing and it does not work. it will not restore the split screen How do I get this back before I toss the computer out of the window? thank you