POS products can be grouped within three different levels: product sub-classes are the lowest level. Product sub-classes can be grouped into classes, which are in turn grouped into departments.
Go to Administration > POS Settings > Product Sub-Classes.
Choose one of the following:
To create a new product sub-class, click Add New.
To modify an existing product sub-class, click the Description of the sub-class that you want to modify.
Select the Class that you want to assign the product sub-class to.
Enter a brief Description of the product sub-class.
Click Save.
Adding or modifying a POS product
Adding or modifying a POS product department
Adding or modifying a POS product class