How to display form with filter

Hello, I have a record lets say customer and from this a subform lets say account that will display all transactions belonging to this customer account. How do I set the filter on the subform so that it displays only information relevant to the customer concerned, so far I have created the subform but it diaplays all transactions. Regards

Did you specify the Subform link? On the Main Form, select the Subform control and choose Properties. Then specify the SubFormLink property. e.g.: Customer No.=FIELD(No.)