1. A computer-implemented method, comprising: generating, by a computer processor, a graphical user interface including a model of anatomical structures of a patient, overlaid with components that are modifiable in response to changes in stimulation parameter settings of a leadwire implanted in an anatomical region of the patient in which the anatomical structures are located; for each of at least a subset of the modeled anatomical structures, overlaying, by the processor, a respective graphical indicium over the respective modeled anatomical structure that distinguishes the respective modeled anatomical structure from other modeled structures in the graphical user interface; and displaying, by the processor, a legend that includes swatches of different ones of the graphical indicia adjacent respective textual descriptions of the modeled anatomical structures to which the graphical indicia correspond.