Canon REBEL SL1 EOS 100D Instruction Manual page 92

P.
Program AE
The camera automatically sets the shutter speed and aperture to suit
the subject's brightness. This is called Program AE.
Set the Mode Dial to <P >.
;iiiill
Focus the subject.
Look through the viewfinder and aim
the selected AF point over the
subject. Then press the shutter button
halfway.
The dot inside the AF point achieving
focus lights up briefly in red, and the
focus confirmation light <0 > on the
viewfinder's bottom right lights up (in
One-Shot AF mode).
The shutter speed and aperture will
be set automatically and displayed in
the viewfinder.
Check the display.
A standard exposure will be obtained
as long as the shutter speed and
aperture display do not blink.
.... Take the picture.
Compose the shot and press the
shutter button completely.
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