I have been trying, unsuccessfully, to change the default font for messages in the Preferences of Outlook 2011. Is there some secret? I change it. Close the window. Reopen the window and go to the Fonts tab for Preferences. It's back to Calibri. I've tried changing it, quitting Outlook, relaunching Outlook, and checking the Preferences, only to find that it's reverted to Calibri. I've changed other Preferences, but this one won't take. Please help.