DVS 4 - Page 104

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12.4.5 PTZ Control
 Users are able to control PTZ with Symbian by touching the screen.
 Touch sides and corners of the screen to change the direction as user want.
 Touch right side of the screen to move right and left side to move left.
 Touch up side of the screen to move up and down side.
 Touch twice to zoom in and touch once to zoom out.