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After the type is assigned to the event, it is removed from the Current events tab in the Operator protocol window. If the event (after being processes) is not removed from other Operator protocols when configuring the Operator protocol (see Configuring the position of see Setting the options for handling events in the Operator protocol object section in Administrator's Guide), then the processed event is marked grey in other Operator protocol windows. But other operators can process this event once again. 

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