protected function newPage($init = false)
    {
        $this->columnCP++; //increment the column pointer
 
        if ($init || ($this->columnCP >= $this->columns)) {
// if it is time for a new page
            $this->AddPage();
 
            //Set Auto page break to false
            $this->SetAutoPageBreak(false);
 
            $this->SetMargins(0, 0, 0);
            $this->SetHeaderMargin(0);
            $this->SetFooterMargin(0);
 
            $oTemplate = Template::model()->getInstance();
            $sLogoFileName = $oTemplate->filesPath . Yii::app()->getConfig('pdflogofile');
            if (file_exists($sLogoFileName)) {
                $result = LSYii_ImageValidator::validateImage($sLogoFileName);
                if (isset($result['check']) && $result['check'] == true) {
                    $sLogo = "@" . file_get_contents($sLogoFileName);
                    $this->Image($sLogo, 15, 5, 0, 7);
                }
            }
 

$config['pdflogofile'] = 'logo_pdf.png'; // File name of logo for single answer export. Path is theme path, i.e. theme/default/logo_pdf.png.

Changes from 3.21.5 (build 200115) to 4.0.0 (build 200116) January 16, 2020
...
-New feature #14668: Custom logo at queXML export (Marko Bischof)
...