How do you vend different bottle sizes on a dixie narco 501e vending machine?

To vend different bottle sizes on a Dixie Narco 501E vending machine, you need to configure the machine's settings using the keypad and programming mode. Access the programming mode by pressing the correct sequence of buttons, usually involving the "Program" or "Service" button. Once in programming mode, you can assign different bottle sizes to specific selections by adjusting the price and capacity settings for each slot. Make sure to also ensure the correct bottle sizes are loaded in the corresponding slots for proper vending.