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; in accordance with an identified therapy, sorting, by the processor, the modeled anatomical structures by degree of relevance of the respective modeled anatomical structures to the identified therapy; 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, wherein the legend includes a first section in which a first set of the graphical indicia and their corresponding textual descriptions are displayed and a second section in which a second set of the graphical indicia and their corresponding textual descriptions are displayed, the graphical indicia and corresponding textual descriptions being grouped into the first and second sets according to the sorting of the modeled anatomical structures.