Setting up printer for printing of invoices is performed in the following way:
Selection of printer for printing of invoices: Go to Back Office -> Settings -> Settings -> Printers, after you click on Open you will see a list of all available (installed) printers.
After you find the desired printer for printing of invoices on the list, you should select it. That is done by clicking on button Set, which is at the end of the list of printer names. In the list of printers there is also adjustment of emulation that printer is using, so you can select five different ones (Samsung 0, Samsung, Epson, Star and OCOM), depending on the model of printer that you have.
At the bottom of the window there is an option of Display printout on the screen. In order for your invoices to be printed on a printer, it is important that you put the option Display printout to NO, after you are done click on Save.