Creating PO category tables Create PO category table to define multiple PO categories that are valid for one rebate agreement. From the main menu, select Master Explorer > Configuration > Custom Grouping Tables > Purchase Order Category Table. Click New. Specify this information: PO Category Table Specify a code to be the unique identifier for the PO Category table. Description Provide a brief description about the item table. PO Category Table Name Specify a name for the PO Category table. In the Details section, click the first row and select a lowest value and a highest value. To add another row, click Add. Click Save and close the form.