I am at a loss as to what my mail is doing. When I open it, the entire screen is filled white with a limited toolbar. The only way I can get out of it is to open the App file and go to Safari. I can usually read my mail, but not always. I know there is someplace I can go to undo this but I have no idea where. I think I may have caused this somehow but no idea what I might have done. I'm attaching a screenshot of what I can see when I use the Safari app. Help, please!