A dossier for an individual or group of individuals can be printed by depressing the dossier button; performing whatever sorting and selecting is required; and then pressing the print button.
Bear in mind that your system might be normally set up to print to a special PVC card printer, whereas the dossier might be intended for a laser or inkjet printer. Make sure you select the desired printer and position the dossier on the page, before starting the printing. Just think of the dossier as a large badge!