Step-1:Create Order:In catalog you can select category(Ex:Break Fast)by items,(Ex:Idly).
Step-2:Increase and Decrease orders:Select the product name to view the product rate and quantity number of the product and increase and decrease symbol.To click increase symbol (+) the quantity and rate of the product is increase and click decrease symbol (-) the quantity number also decreased.
Step-3:Check out:Select the checkout form the catalog it should be navigated to cart to see the created order details.
Step-4:Back to menu to order different Category\Product:
And also customer want to select item for another product from different category click on back button to select the another category item(Ex:Category-Soft drink,Product-Lassie)for more information follow the figure:
Figure for Create Order