Without the session.json file present at startup, Thunderbird employs default configuration settings. I've since told CCleaner to keep its hands off that particular file. Then in the morning when I fired Thunderbird up again, that infernal message pane was open. I learned by sleuthing that my CCleaner was deleting session.json when I shut down at night. However, it may appear again if Thunderbird is up long enough. When Thunderbird is if fired up, it reuses the preferences stored in the file and then deletes it temporarily. It stores some display configuration settings - including the most current message pane preference - to be carried over between logon sessions. Unless deleted, it is always present when Thunderbird is logged off, and sometimes when logged on. There's a file in the Thunderbird profile (17.0.6 anyway) called "session.json". This many not address everyone's message pane problems, but here's my finding. Measures reduce the crap a lot in my experience. Mark a bunch of bad stuff as Junk (or Spam or whatever)? Both of these PS: have you created filters? Do you visit your ISP's web portal, and Use a larger displayįont instead (RC on Desktop > Properties > Appearance > Fonts > select Order to get larger fonts, but it's a bad idea. Did you by any chanceĬhange the resolution from other than native? A lot of people do that in My wife has aġ024x768 laptop, also has lots of screen space. Much less than the old CRT (max resolution 800圆00). BTW, this monitor cost less than my previous 1280x1024, and Screen for this desktop, and have plenty of screen space for reading Maybe it's your monitor size or resolution setting. Posts/mails written in HTML with a teeny font, which I have to enlarge. > messages in a very small window, and having to scroll to see more than > My main reason for not using it is that I don't like trying to read I don't like the small window, and I REALLY don't want to see some > I don't want a message opened until I order it opened. > opening a message automatically, simply because it has the > I see no reason (or excuse) for the app to be Thunderbird does not open attachments automatically. > Whatever email is selected in the list is being opened, even > Then go to View/Layout and uncheck 'Message Pane'. > Gone from your eyes maybe, but I suspect not closed. Just drag the tom of it down to the bottom of the screen. Is there a way to turn the preview pane off, and have it