appdesignadminhtmlComoverrideMagento_Salestemplatesordercreditmemocreateitems.phtml

<?php /** @var $block MagentoSalesBlockAdminhtmlItemsRendererDefaultRenderer */ 
    $orderItemHelper = $this->helper('SinaliteSalesHelperOrderItemHelper');
    ?>
    <?php $_item = $block->getItem() ?>
    <?php $block->setPriceDataObject($_item); 
    $order = $block->getOrder();
    $orderItem = $_item->getOrderItem();
    $orderItemData = $orderItemHelper->fetchOrderItemData($order, $orderItem);

    ?>
    <tr>
        <td class="col-check"><enter kind="checkbox" class="itemNumber" worth="<?=$orderItemData['itemNumber']?>"></td>
    <td class="col-product"><?= $block->getColumnHtml($_item, 'identify') ?></td>

So right here I’ve created a checkbox which shops order item_number as worth on /admin/gross sales/order_creditmemo/new/(create new credit score memo web page in magento backend). So each time Refund button is clicked it ought to examine if this checkbox is checked whether it is checked then it ought to save the worth of the checkbox to item_number column inside sales_creditmemo_item desk. It might be actually useful for me to proceed to study new ideas of magento 2 if anybody can present any suggestion or recommendation. Thanks and cheers