If your kiosk has a printer, the name badges will be printed automatically for each guest as soon as you authorize them to enter (see Verwaltung ankommender Gäste).
If you want to print a name tag again, you can do this in the detail view of the guest. To do this, first click on the "On-site" area in the reception.
Select the guest and click on "Print name badge" in the left area of the detail view. The name tag will then be printed again.