To setup your printers in Mynt, open the Peripherals Setup window (Setup > Peripherals).
To setup your receipt printer, click on the receipt printer that you would like to setup.
In the window that opens up, select Windows Printer Driver, using the drop down list, select your receipt printer. Clicking the self check button will test the printer. You also have the option on this screen to turn on or off header or footer logos.
Once you have completed the setup, click Accept to save the configuration. All sales receipts will print at the default printer, to configure a kitchen printer, see this page.