Loyalty program (discounts, standard functions)
Go to menu/administration (in the top right corner of the screen):
At the opened dialog window put title as well as choose discount format ('In percent' or 'for the amount'). If you select 'Percentage' b>, in order to select a discount that applies to all products, tick the 'Apply discount to all products » and specify the discount amount in the ' Discount ' field
And if the discount is needed only for a certain product, then after the size of the discount is set, click on the button « Add/Remove »
At the opened window set checkbox in front of the positions to which the discount will be applied, then press « Save »
Then traditionally ;-) click the button « Save »