quaillady and featheredobssesions, pls correct me if i'm wrong. i had the same question before. this is what i found with my research:
first the egg is marked X and O on either side. while egg is sitting on the egg tray with the large end up, with X facing you and the tray is tilted (for example one end is propped by a book), you turn the egg 180 degrees so that now you see the O.
(the same will be accomplished if the egg tray sits on a fulcrum like the see saw and the egg tray is see sawed to turn. one end of tray goes up, the other end goes down, and so forth and so on. this is how i 'turned' my eggs)