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- either from the beginning of an alarm event,;
- or from the moment corresponding to the position of the alarm event flag (only when the alarm event is initiated automatically—-see Initiate alarm).
If the alarm event is initiated automatically, the visual element set for the detection tool, which initiated the alarm event, is displayed in the Surveillance window: either a detection area or virtual line that, when crossed, cause the detection tool to generate an event. The object that caused the detection tool to generate an alarm is outlined with a red border.
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