Canon EOS Rebel SL2 Basic Instruction Manual page 108

Auto Correction of Brightness and ContrastN
3
If the image comes out dark or the contrast is low, the brightness and
contrast can be corrected automatically. This function is called Auto
Lighting Optimizer. The default setting is [Standard]. With JPEG
images, the correction is applied when the image is captured.
In Basic Zone modes, [Standard] is set automatically.
106
Select [Auto Lighting Optimizer].
1
Under the [z3] tab, select [Auto
Lighting Optimizer], then press
<0>.
Select the setting.
2
Select the desired setting, then press
<0>.
Take the picture.
3
The image will be recorded with the
brightness and contrast corrected as
necessary.