Canon EOS-1D X Instruction Manual page 210

A Shooting with the LCD Monitor
Final Image Simulation
The final image simulation reflects the effects of the Picture Style, white
balance, etc., in the Live View image so you can see what the captured
image will look like.
During shooting, the Live View image will automatically reflect the
function settings listed below.
Final image simulation during Live View shooting
Picture Style
* All parameters such as sharpness, contrast, color saturation, and color tone
are reflected.
White balance
White balance correction
Exposure (with [Expo. simulation: Enable])
Depth of field (with depth-of-field preview button ON)
Auto Lighting Optimizer
Peripheral illumination correction
Highlight tone priority
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