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The configuration key config.gravity.RedemptionProducts.groupTriggerQuantity defines the number of performances per event from which the two level display is enabled (select first event then expand the event to select a performance). For instance, if config.gravity.RedemptionProducts.groupTriggerQuantity is set to 3, the internet user will select first an event, then a performance if there are events having 3 or more performances available for the same eventwill be displayed in a compact way.