1. A method of a stimulation parameter selection machine, the method comprising: displaying, by a processor of the machine, via a display device, and in relation to a displayed model of a leadwire, an initial current field corresponding to a first stimulation parameter set; in response to user input, shifting, by the processor, the display of the current field with respect to the displayed leadwire model; determining, by the processor, a second stimulation parameter set that results in the shifted current field; and at least one of (a) outputting the second stimulation parameter set, and (b) setting a stimulation device with the second stimulation parameter set, the stimulation device configured for performing a stimulation (1) using a leadwire modeled by the leadwire model and (2) in accordance with the second stimulation parameter set; wherein: the user input is via hitting one or more displayed components of a user interface; the displayed components include a first set of directional buttons that each corresponds to a respective axial direction and for each of which the processor is configured to interpret hitting of the respective button as an instruction to shift the displayed current field in the respective axial direction to which the respective directional button corresponds; and at least one of: the displayed components further include a rotational directional button, hitting of which the processor is configured to interpret as an instruction for a gradual shift of the displayed current field rotationally about a central axis; and the first set of directional buttons includes a button, a hit of which the processor is configured to interpret as an instruction to shift the displayed current field from a first location to a second location that mirrors the first location about a predetermined axis.