Particular embodiments display a series of objects across a screen of an electronic device, the objects being arranged side by side; display a boundary of each object in the series, the boundary of an object near the center of the series slightly overlapping a portion of each of two objects next to the object nearer the center of the series; and display a shadow around the object near the center of the series, the shadow overlapping a portion of each of the two objects next to the object near the center of the series to simulate an visual effect that the object near the center of the series is above the other objects in the series.