I will be talking about the Nikon D3100. What I have learned is that you can switch the camera from manual mode and automatic mode for focusing. Also you can switch the Lie View so you can see the picture on the screen or you can look with your eye through the lens. You can also use the mode dial to pick from many different camera option such as: Manual, automatic, and many other just like these. In the cameras menu you change a setting so when you take a picture it will rotate it automatically for you instead of you needing to rotate it. You can also change the size of the image and how it appears on your camera. This camera also has a built in flash that you can turn on and off as you please to do so!