if (this.config.txt.right !== undefined && this.rectMid.width > 2 * len) {
        _drawTxt(this.context, this.rectMid.left + this.rectMid.width - this.scale,
          this.rectMid.top + spaceY, this.config.txt.right,
          this.layout.scroll.font, this.layout.scroll.pixel, this.color.axis, { x: 'end' })
      }