Canon BJC-5100 Series User Manual page 26

The Ports Tab
This tab allows you to select the port to which you want to print
documents. You can also enable or disable bidirectional support and
printer pooling. (You see this tab when you open the Properties dialog
box from the Printers folder, not from within a Windows applications.)
2-12 Using the Printer With Windows
CHOOSE THE
PRINTER'S PORT
CHANGE PORT SETTINGS
CHECK ENABLES FEATURE;
NO CHECK DISABLES
FEATURE
Chapter 2