The [Physical Printer] column shows the physical printers associated with the printer. To increase the number of physical printers, modify the value in the [Number of Physical Printers] field.
Increasing the number of physical printers creates a "Printer Pool".
Printer Pools - A Printer Pool is a printer with two or more physical printers. They are an effective tool when printing high-volume jobs. When two or more physical printers are configured as a printer pool, RIP-Queue automatically sends jobs to the first printer that is ready. You can also have each physical printer loaded with a different media. This allows incoming jobs to be sent to the printer pool without needing to change the media on the printer.
NOTE: If you cannot increase the number of physical printers, you do not have sufficient Permissions. Contact your sales representative for an upgrade.