How to make a product discount

Hi,

You can go in the menu Orders>Discounts, click on the "new" button and in it enter the percentage or the amount and select the product in the "products" option.
If you want to be able to apply discounts from the products, what you can do is pre create discounts in the menu Orders>Discounts and restrict each discount to an unpublished category corresponding to that discount.
Then, in each product, you can add these categories as a second category of your products to automatically apply the discount to the product.