Canon ICAM62B Advanced User's Manual page 187

Even if you set the drive mode to [E], [ o ], or [ i ], the camera will still
z
shoot in the single shooting mode.
Even if [AF operation] is set to [Servo AF], tapping on the screen will focus on
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the image with [One-Shot AF].
Tapping on the screen in magnified view will not focus or take the picture.
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If you shoot by tapping on the screen with [z: Image review] set to [Hold],
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you can press the shutter button halfway to take the next shot.
To shoot with bulb exposure, tap on the screen twice. The first tap on the
z
screen will start the bulb exposure. Tapping it again will stop the bulb exposure.
Be careful not to shake the camera when tapping on the screen.
Touch Shutter
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