Adding Backorder in Invoice PDF Woocommerce Booster

Hi can, someone please help me on how I will add a Backorder text with it’s value ordered in the Invoice PDF, by the way I am using Booster For Woocommerce plugin. I am not sure if I need to add a hook or a shortcode in the template of the invoice.

• This topic was modified 3 years, 5 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic