Typically you want two main buttons active in Sales to help operators use the pinpads.

 

This will add a Debit pinpad button. Operators must select this button if the guest will be using a debit card.

This will add a Credit pinpad button. Operators must select this button if the guest will be using a debit card.

 

The Pinpad will use the printer that is configured in Tools > Sales Pt Setup > Printing > CC Receipt.

 

You can test the connectivity of the pinpad in Sales by going to Tools > Credit Cards > Initialize Pinpad.