how to add button or code IN short description (using functions.php) ??

and what is the name of single product page ? to IF condition
-> if is_single_product ??

Hi @tomektomek21,

The best way to add something to the short description is to create a custom template for the following file in the plugin directory:

templates/template-parts/product-page/product-short-description.php

Please see the docs for details: https://implecode.com/docs/ecommerce-product-catalog/product-page-template/