Products or Services can added to any business or operation from the Homescreen.
From the '+' button that is found on the toolbar.
On the Homescreen select an organization or operation from the drop down list in the leftmost column.
Click the 'ADD' next to the 'Eye Icon' by hovering over the Products/Services tab.
Select the organization or operation that provides the product/service. Select the category or categories that describes the product's material. If the correct category cannot be found click "+ Add a new category" and create one.
Select the new product and any other products that should be added to the selected organization or operation. Finally, click 'ADD'.