From MatterControl Manual
< SETTINGS | Printer | Features | Hardware(Redirected from Settings/Printer/Features/Hardware/Extruder Count)
The number of extruders the printer has.
This value affects several parts of the application:
- how many material preset menus are available
- a value greater than 1 shows the MATERIALS section in 3D View.
- a section for each extruder's specifications is shown under the Extruder subcategory.
In this example, the printer has two extruders.