Hi ostoura, have you considered to use the AnimationPlaybackController returned by the playAnimation method? Store the playbackController when initially play the animation @State private var playbackController: AnimationPlaybackController? Modify your playThis() to: func playThis() { guard let animationResource = manPlayer.availableAnimations.first else { return } playbackController = manPlayer.playAnimation(animationResource.repeat(duration: .infinity), transitionDuration: 0.25, startsPaused: false) //infinity looping, smooth transition, animation starts immediately playbackController?.speed = speed } Adjust speed functions func increaseSpeed() { speed += 0.1 playbackController?.speed = speed } func decreaseSpeed() { speed = max(0.1, speed - 0.1) // prevent negative or zero speed playbackController?.speed = speed } Now you should be able to adjust the animation speed while it is running I hope this helps Flip