docs: function() {
      var key,
          i;
  
      for (key in this.series) {
        for (i = 0; i < this.series[key].length; i++) {
          this.series[key][i].clear();
        }
      }
      this.scale = this.baseScale;
      this.transX = this.baseTransX;
      this.transY = this.baseTransY;
      this.applyTransform();
    }