QNAP VS-2004L en - Manual (Page 203)

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(2) Camera control
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. 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 the preset settings of the PTZ cameras
have been configured.