Canon 200 IS - Manual (Page 80)

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While you keep the shutter button pressed halfway, the focus and exposure
are locked. You can now recompose and shoot. This is called Focus Lock.
Focus.
● Center the subject you want in focus, and
press the shutter button halfway.
● Confirm that a green AF frame appears
around the subject.
Recompose.
● Keep the shutter button pressed halfway
and recompose the scene.
Shoot.
● Press the shutter button fully.
You can touch on the screen instead of the shutter button to shoot when
holding the camera vertically. You can still also use the shutter button.
Shoot.
● Hold the camera vertically.
X will appear.
● Point the camera at the subject and touch
.
X When the camera focuses, it will beep
twice and take the shot right away. This is
unlike when you shoot with the shutter
button and first press it halfway.
Changing the Composition with the
Focus Lock
Holding the Camera and Shooting
Vertically (Vertical Shutter)
To prevent the icon from appearing, press the n button, select
the 4 tab, and then select the [Vert. Shutter] menu item and the [Off]
option.