Reader
fun ReaderViewPanZoomGestureOptions(allowSinglePointerPan: Boolean = true, maxPanOffsetHorizontal: String = "50%", maxPanOffsetVertical: String = "50%", maxScaleFactor: Double = 5.0, pinchZoomThresholdPx: Int = 32, pointerTypes: PointerTypeOptions = PointerTypeOptions(), removeTransformOnZoomOutGesture: Boolean = true)