Auto lighting optimizer, 3auto lighting optimizer n – Canon EOS 60D User Manual
If the image comes out dark or the contrast is low, the brightness and
contrast can be corrected automatically. The default setting is [Standard].
With JPEG images, the correction is done when the image is captured.
Select [Auto Lighting Optimizer].
Under the  tab, select [Auto
Lighting Optimizer], then press
Set the correction setting.
Select the desired setting, then press
Take the picture.
The image will be recorded with the
brightness and contrast corrected if
Auto Lighting OptimizerN
If [8C.Fn II -3: Highlight tone priority] is set to [1: Enable], the Auto
Lighting Optimizer will be set automatically to [Disable] and you cannot
change this setting.
Depending on the shooting conditions, noise might increase.
If a setting other than [Disable] is set and you use exposure
compensation, flash exposure compensation, or manual exposure to
darken the exposure, the image might still come out bright. If you want a
darker exposure, set this to [Disable] first.
In Basic Zone modes, [Standard] is set automatically.