Changing the AF Frame Mode
Center
The AF frame is locked to the center. This is effective for focusing on a specific point.
You can reduce the AF frame size
•Press the n button to choose [AF Frame Size] from the 4 tab, then choose [Small].
•The AF frame is set to [Normal] when using the digital zoom (p. 49) or digital
If the camera cannot focus when you press the shutter button halfway, the
AF frame will turn yellow and 
will appear.
Changing the Composition with the Focus Lock
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.
zCenter the subject you want in focus, and press the shutter button halfway.
zConfirm that the AF frame on the subject is green.
Recompose.
zKeep the shutter button pressed halfway and move the camera to recompose the scene.
Shoot.
zPress the shutter button fully.
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