Here's a quick reference guide to the buttons, dials, and other external controls on your D3100. Note that the lens shown is the Nikkor 18–55mm AF-S DX (Vibration Reduction) model sold with the D3100 kit; other lenses may not have the same controls.
![A Nikon 3100 camera with all the buttons explained](https://www.dummies.com/wp-content/uploads/227307.image0.jpg)
![The buttons in a Nikon lens explained.](https://www.dummies.com/wp-content/uploads/227308.image1.jpg)
![Top view of a Nikon D3100 camera with every button explained.](https://www.dummies.com/wp-content/uploads/227309.image2.jpg)
Here's a quick reference guide to the buttons, dials, and other external controls on your D3100. Note that the lens shown is the Nikkor 18–55mm AF-S DX (Vibration Reduction) model sold with the D3100 kit; other lenses may not have the same controls.