how to make an action that pulls up a record

I want to create a button on the customers page that goes to the invoice page and pulls up that customers invoice. right now i’ve made a button that goes to the invoice page but it pulls up a blank invoice instead of bringing up that specific customers invoice. how do i define the action so it pulls up the customers invoice? the navigation parameter would be the reference number but the customer’s page doesn’t have a reference number. reference number and type are the only options when choosing navigation parameters btw