Canon POWERSHOT A2400IS User Manual page 77

The camera's touch-screen panel enables intuitive operation simply by
touching or tapping the screen.
Touch the screen briefly with your
finger.
This gesture is used to shoot, configure
camera functions, and so on.
Touch the screen and move your
finger across it.
This gesture is used in Playback mode to switch
to the next image, or to change the magnified
image area, among other operations.
(_ Gestures may not be detected as easily if you apply a screen
protector, because the screen works by detecting finger pressure.
_/ Using the Stylus
If you have difficulty operating the camera by
touch, use the included stylus (p. 2). Do not
use pencils, pens, or sharp objects other than
the included stylus to operate the touch-
screen.
To correct any discrepancy between the
position you touch and the position detected,
calibrate the screen (p. 130).
The stylus can be attached to the strap as
shown.
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