Canon EOS Rebel T3 18-55mm IS II Kit Instruction Manual page 125

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 still photo shooting, the Live View image will automatically reflect
the 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 preview (With C.Fn-8-5 set and <0> ON)
Auto Lighting Optimizer
Peripheral illumination correction
Highlight tone priority
A Shooting with the LCD Monitor
125