Per-Model Extruder refers to choosing an extruder for your model. If you have set the Extruder Count to be 2, this interface will show Left Extruder and Right Extruder. If you have set the Extruder Count to be 1, this interface will show Primary Extruder only. And we define the left extruder as primary extruder by default.
Figure 1: Choose an extruder for your model.
-END-
