User interfaces are provided that allow for the display of a target element that may be used to adjust a gamma value of a display device. The target element includes three layers. These layers include a bottom static layer, a gray static layer, and a progressive layer that gradually changes from a fully transparent are to an opaque area. Additionally, a manipulation area is provided, which may be a sliding mechanism. The user may adjust the gamma to a higher value when the fully transparent area appears lighter than the opaque area, and may adjust the gamma to a lower value when the fully transparent area appears darker than the opaque area.