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To change the angle at which a camera is panned/tilted, you can also tap any area of the video with your finger. The camera lens is automatically reoriented to the selected area (Point&Click).
To control optical zoom, use the 
buttons.
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To do this hold the finger on the interested area during 1 second and then move the finger to change the size of appeared blue frame. After that the lens orintation will be changed in such way that selected area will display at full window (Areazoom).
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