Download page Printer.
Menu path: Devices > Printers
You can set up a printer for the thin client here.
The printers must be set up under Devices > Printer > CUPS > Printers and must be enabled there for mapping in sessions.
Because the thin client merely places incoming print jobs in a queue, you need to install the printer on the server. Please note that you will need to be logged in as administrator to the terminal to which the printer is connected.