A piston for an internal combustion engine, which performs a sliding reciprocating motion in a cylinder, and a method for producing the piston. In an embodiment of the invention, a method for dynamic activation of service indicators based upon service personnel proximity is provided. The system derives proximate characteristic values corresponding to a plurality of proximate pixels which are proximate to the target pixel. The method also includes updating the button such that the secondary function is associated with the primary function area and the primary function is associated with the secondary function area and displaying the updated split mode command button to a user. In this manner, no matter what rotation speed of the optical disc is, the rotation of the optical disc can always be ceased by a fixed period of time.