Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 333)

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z You can select effects such as
[Brightness] or [Contrast] by pressing
< 0 > and then using the < Y > < Z >
keys.
z Press < 0 > when adjustment is
finished.
z To reset the effect, press the <
A
>
button.
z To confirm the effect, press the <
S
>
button.
4
Select [OK] to save the image.