Canon PowerShot SD1400IS User Manual page 62

Using the Face Self=Timer
Join the subjects and look at the
camera,
When the camera detects a new face, the
lamp and sound will speed up (the lamp
remains lit when the flash will fire), and
two seconds later the shutter will release.
To cancel shooting with the timer after
countdown has started, press the "_"
button.
For the screen in Step 1, press the DISP. button, then press the Av buttons to
change the number of shots. Press the DBSP. button to accept the setting.
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