A system and computer program product for displaying data in a graphical overlay. The system overlays a first lens, including a first dataset, on a first region of the graphical overlay while a second lens, including a second dataset, overlaps the first lens. The first and second datasets are simultaneously displayed, and a correlation between the datasets is determined. Separation of the first and second lenses preserves a circumscribed region within each lens. The first dataset corresponds to first orientation position of the first lens. Rotation of the first lens to a second orientation position reconfigures the first dataset to provide a modified first dataset which corresponds to the second position. A rotational position may also be associated with points in time, a first position corresponding to a first point in time and the first dataset representing the first dataset at the first point in time.