The document provides instructions for setting up and applying discounts in a point of sale (POS) system. It explains how to create new discounts under Maintenance settings and discounts. Discounts can then be applied to individual items or the total by clicking the discount amount, selecting the relevant discount, and finalizing the sale. Discounts set as percentages can only be applied to the total, while discounts set as dollar amounts can be applied to either items or the total.