Apply discount to a specific product

I´m working with commerce kickstart 2, and I have a question about discounts.
When I create a new discount offer from Store settings > Promotions > Discounts, this discount is applied to all products in the store. I can´t find a field where I can appli this discount for a specific product.
For example, for a product black shoes, make a discount of 10% off, if a create a 10% discount ¿How could I assign this discount only for this product?

Thanks for help!

Posted: Jan 14, 2013