I want to add a text button after “Add to Cart” on the specified page. Click the text button to pop up the picture. Just like a “size guide.” Can this feature be added?
There is no option provided by the default WooCommerce.
You can add an HTML block in the After “Add to cart button” text area in Theme Settings > Product page. However, this content will be seen on all the products.
Sorry, but it is a global option. You can’t specify which pages to display this content on.
In such situation, you can put your custom content to the short description field for particular products.