If you have a large number of machines that similar in row/column layout, products, and prices, using a saved planogram can save you time when creating machines.
You can access the planograms from Settings > Vending > Planograms, where you can create planogram templates for applying to other machines, filling selections automatically with the products and prices you saved.
You can also create a planogram template from an existing machine by going to Vending > All Machines, clicking to the right of the appropriate machine, and then clicking Options > Create Planogram from Machine, seen below.