If the Category of the classification, set in the discount properties, is selected for the discount detail, both the discount and the linked bonus will be applicable to certain dishes only. Moreover, all dishes, in this case, should have a 100% bonus.
If no category is specified in the detail properties, and a 100% bonus is set for several specific dishes only, whereas other dishes have a 0% bonus, the discount will be applicable to all dishes from the menu, meanwhile, the bonus will be calculated for those dishes only with a 100% bonus.