Canon EOS Rebel T6 Instruction Manual page 106

D Using the Built-in Flash
3 Red-eye Reduction
Using the red-eye reduction lamp before taking a flash picture can
reduce red eye.
Red-eye reduction will function in any shooting mode except <7>,
<3>, <5>, or <k>.
The red-eye reduction feature is more effective when the subject looks at

the red-eye reduction lamp, when the room is well lit, or when you are
close to the subject.
When you press the shutter button halfway, the

scale display on the bottom of the viewfinder will
shrink and turn off. For best results, take the picture after this scale
display turns off.
The effectiveness of red-eye reduction varies depending on the

individual subject.
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Under the [z1] tab, select [Red-eye

reduc.], then press <0>.
Select [Enable], then press <0>.

For flash photography, when you

press the shutter button halfway, the
red-eye reduction lamp will light up.
Then when you press the shutter
button completely, the picture will be
taken.