Canon EOS 600D Instruction Manual page 127

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
will be reflected.
White balance
White balance correction
Shoot by ambience selection
Shoot by lighting or scene type
Exposure
Depth of field (With depth-of-field preview button ON)
Auto Lighting Optimizer
Peripheral illumination correction
Highlight tone priority
Aspect ratio (Image area confirmation)
A Shooting with the LCD Monitor
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