QNAP Security VioStor NVR (Version: 3.5.1) - Manual (Page 96)

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When an event occurs to an IP camera on the E-map, the camera icon will flash and indicate
the event type. The E-map with the IP camera on which an event is triggered will be
shown immediately*. Double click the camera/alert icon and the monitor screen will
switch to display the alert camera channel in single-channel view on the monitor screen
automatically.
*The E-map with event alert will not be switched to display automatically if the time
difference between the event time and the last time the user uses the E-map (clicks the
E-map window) is less than 20 seconds. In this case, refer to the tree menu on the left to
locate the IP cameras with alerts/flashing icons.