a small desk accessory called "choose printer" allowed the printer driver and serial port to be selected for the connected printer. it did this by listing known printer drivers, displayed as icons of the printer model in question, and allowing the user to select it by clicking on the icon. the icons were expected to physically resemble the printer in question and were contained in the drivers' resource fork. at this point the two serial ports appeared, allowing the user to indicate which port that printer was connected to.