Override Prestashop -

<?php // override/controllers/admin/AdminOrdersController.php class AdminOrdersController extends AdminOrdersControllerCore

public function initToolbar() parent::initToolbar(); $this->toolbar_btn['custom_export'] = [ 'href' => self::$currentIndex.'&token='.$this->token.'&export_custom=1', 'desc' => $this->l('Custom Export', null, null, false), 'class' => 'btn btn-primary' ]; override prestashop

<?php // override/modules/blockreassurance/controllers/front/AdditionalProductTabController.php class BlockreassuranceAdditionalProductTabController extends BlockreassuranceAdditionalProductTabControllerCore toolbar_btn['custom_export'] = [ 'href' =&gt

/modules/blockreassurance/controllers/front/AdditionalProductTabController.php 'btn btn-primary' ]