Canon EOS-1D Mark II - Displaying the Edited Image and the Original at the same Time

Selecting the Image Display Mode
3-6
You can display the edited image and the original at the same time.
Changing the Display Position
You can also tile images vertically.
Select [View] menu 

 [Before/after comparison].
 The images are displayed as
shown on the right (2-36).
Select [View] menu 

 [Change up/down/left/right].
 Performing the same operation
again tiles images horizontally.
Displaying the Edited Image and the Original at the Same Time