1. A method comprising: displaying, by a data processing system, an image having an appearance of a compound lens that includes a focal region at least partially surrounded by a shoulder region across which magnification decreases from a magnification of the focal region to a magnification of a region of the image outside the appearance of the lens, the focal region including a plurality of facets, each facet having substantially similar magnifications, one to another; and responsive to receipt of data indicating selection of one of the facets of the appearance of the conpound lens, transitioning from a display of the appearance of the compound lens having the plurality of facets to a display of an appearance of a simplex lens having a single facet having data from the selected facet of the appearance of the compound lens.