Canon POWERSHOT D20 User Manual page 7

Shooting Range and Focusing
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@ Choosing Subjects to Focus On (Tracking AF)
Shoot after choosing a subject to focus on as follows.
Choose [Tracking AF].
Follow the steps in "Changing the AF Frame
Mode" (p. 112) to choose [Tracking AF].
_ }s displayed in the center of the screen.
Choose a subject to focus on.
Aim the camera so that E_ is on the desired
subject, and then press the 4 button.
When the subject is detected, the camera beeps
and _ .j is displayed. Even if the subject moves,
the camera will continue to track the subject
within a certain range.
If no subject is detected, _F is displayed.
To cancel tracking, press the 4 button again.
Shoot.
Press the shutter button halfway. : :j
changes to a blue [], which follows the
subject as the camera continues to adjust the
focus and exposure (Servo AF) (p. 115).
Press the shutter button all the way down to
shoot.
Even after your shot, : : is still displayed and
the camera continues to track the subject.
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