i just realised i had Do N on the triggering event, anyway i turned it off and now i can keep expand it however the next time i press the button the timeline is not smooth instead i only grow the object with 0.2 more scale instantly
i just realised i had Do N on the triggering event, anyway i turned it off and now i can keep expand it however the next time i press the button the timeline is not smooth instead i only grow the object with 0.2 more scale instantly