Custom field display in the PDF plugin invoic

Hi,

Go in the menu Display>Views and search for the pdf_layout view.
You'll find the 4 different layout files corresponding to the "layout" setting in the PDF invoice plugin.
So edit the one corresponding to the layout you're using.
There, the product name is displayed with the code:

echo implode('<br/>',$this->str_split_unicode(strip_tags($product->order_product_name),50));

$productClass = hikashop_get('class.product');
$productData = $productClass->get($product->product_id);
echo '<br/>'. $productData->xxx;