public function addPage()
    {
        $this->pageN++;

        // Add a little margin to max Y "between pages"
        $this->maxY += 10;

        // If Y is still heigher by any reason...
        if ($this->maxY < $this->Y) {
            // ... update max Y
            $this->maxY = $this->Y;
        } else {
            // else update Y so that nothing will be overwritten, like images or cells...
            $this->Y = $this->maxY;
        }
    }