: Head ID input, angular adjustment, and Bi-D (bi-directional) alignment.
Assuming you have physically dealt with the waste ink pad (or are willing to risk a leak), here is the technical walkthrough. Epson Adjustment Program Et-2750
Resetting the counter tells the printer, "The waste ink pad is brand new." However, it does not physically empty the pad. If your pads are truly saturated, resetting the counter without replacing or cleaning the pads can lead to ink leaking out of the bottom of the printer. : Head ID input, angular adjustment, and Bi-D
This feature is the advanced users and small print shops seek out the Epson Adjustment Program for the ET-2750, as it directly overcomes a built-in planned obsolescence mechanism. : Head ID input