zoomOut() {
    if (!this.ws_.options.showIndex) return;
    this.zws_.el.classList.remove('in');

    setTimeout(() => {
      this.ws_.enable();
      this.disable();
      this.isZoomed_ = false;
      document.documentElement.classList.remove(CLASSES.ZOOM_ENABLED);
    }, 400);
  }
Zoom Out the slider, remove scale from the slides.