Hi,
On the product details page of your products, the display of the add to cart button is controlled by only two options:
- The catalog mode setting which override all other settings regarding the add to cart buttons
- The Display 'Add to cart' button setting of the HikaShop configuration
If you want to display or not the add to cart button per product, you configure these two options so that the add to cart buttons are displayed for all the products.
Then, in each product, you can set the quantity to 0 (when there is no stock, the add to cart button is removed automatically), or set a sale start date in the future, or a sale end date in the past.