Shooting mode is found in dial label, and it has options like ‘AV,’ ‘TV,’ ‘P,’ and ‘M.’ This shooting mode will decide how the camera will capture the picture when you press the shutter. For example, if you select Auto, the camera will take care of the exposure automatically. AV or A, also known as Aperture priority, is a semi-automatic mode. In this mode, you set the aperture, and the camera will set the shutter speed. TV or S, it is also a semi-automatic shooting mode, but it is opposite to AV mode. Here you set the shutter speed, and the camera sets the aperture. In P or program mode, you can do both the functions of AV mode and TV mode. So you can either set the shutter speed, or you can set the aperture it is up to you. M stands for manual mode; here, you will have to set the aperture and shutter speed by yourself. If you are new to DSLR cameras, you can start with auto mode.