Described is a press-in element for pressing into a non-pierced or pre-pierced component. For example, when a photograph is to be printed on a glossy paper with low resolution, the ink reduction rate is set to 10%. The nozzle has melt channels communicating with the first manifold melt channel and the second manifold melt channel. The GUI provides the user with a convenient way to view the elements of a large system and determine elements that are different. When a test pattern is supplied to the DUT, a power supply control unit is configured to feedforward control the main power supply such that the power supply voltage VDD approaches a predetermined target waveform VTGT. The synthetic material comprising at least two phases and an optical detectable component, wherein at least one of said phases is a solid phase building a matrix of the synthetic material, and wherein the optical detectable component changes its optical properties when its intact structure is perturbed, said optical detectable component is bond to both phases of the synthetic material.