First thing this afternoon, the background color of the mail composition screen was changed to solid green. The HTML toolbar is semi-transparent, and I cannot change the screen background back to white. When I click the cursor in the compose window, the HTML toolbar appears, but it does not change the background to white. The format tool indicates a white screen with black text. In Config Editor, the compose background colors are white and black text. I have tried several theme changes, including the theme from Mozilla, but there has been no change. Rebooting Win 11, no change. Michael Gordon