Canon EOS 5D Mark III Instruction Manual (en)

A Shooting with the LCD Monitor
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
Aspect ratio (image area confirmation)
Final Image Simulation