QNAP Security VioStor NVR (Version: 3.3.2) - Manual (Page 172)

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(2) Camera control
This option allows you to configure the PTZ camera to adjust to the preset position for
monitoring or act according to the HTTP URL entered when an event is triggered.
You can select a preset position from the drop-down menu or enter the HTTP URL.
Click ‘Select from the list’ to select an action setting which has been configured
before.
Note: The preset names will appear only after you have configured the preset
position settings of the PTZ cameras.