Bialetti Moka Express machine

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I recently purchased a 6-cup Bialetti Moka Express machine, which is perfect for my budget and space needs. Problem is I do not need to make 6 shots of espresso at a time. Does anyone know if you can make fewer than 6 shots with this pot and if so how? I know that you can buy a smaller pot but the 6-cup model is the only one sold at any of the stores near me and if possible I would really like to keep it if anyone knows how to use this pot to make fewer than 6 cups at a time. I really appreciate any help with this (admittedly) simple question. Thank you.