The mode dial, or camera dial, on digital cameras is the mechanism used to change the camera’s setting and access different shooting modes. Compact point-and-shoot cameras will generally access the shooting modes through the menu, rather than a mode dial.
The mode dial is usually located on the top of the camera body and offers a variety of shooting options such as: Av, or A (aperture priority), Tv or S (shutter speed priority), M (manual mode), P (program), B (bulb), Auto, Scene, and C (custom). (Not all are shown here).
For additional details and examples please click: camera mode dial settings.