Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 247)

Exposure Simulation
With exposure simulation, image brightness more closely matches the actual brightness
(exposure) of your shots.
1.
Select [ : Expo. simulation].
2.
Set an option.
Enable ( )
The displayed image brightness will be close to the actual brightness (exposure) of the
resulting image. If you set exposure compensation, the image brightness will change
accordingly.
During
Normally, Live View images are displayed at standard brightness, so they are easy to
see (
). Only when you hold down the depth-of-field preview button will image
brightness resemble actual brightness (exposure) of the resulting image ( ).
Disable ( )
Live View images are displayed at standard brightness, so they are easy to see. Even if
you set exposure compensation, the image is displayed at the standard brightness.
247