Hi,
Open the Product Details Page's PHP file:
/templates/YOUR_TEMPLATE/html/com_virtuemart/productdetails/default.php (or flexv2.php which ever layout you use)
and inject this PHP expression to where ever you want to show the ISBN number:
<?php echo $this->product->product_gtin ?>
For instance, if you want to show ISBN under the Product Name on front-age, then insert that PHP expression after:
<?php // Product Title ?>
<div class="FlexibleProductDetailProductName"><?php echo $this->product->product_name ?></div>
<?php // Product Title END ?>
like this:
<?php // Product Title ?>
<div class="FlexibleProductDetailProductName"><?php echo $this->product->product_name ?></div>
<?php // Product Title END ?>
<p><?php echo $this->product->product_gtin ?></p>
regards.