1-image of small depth of field

2-i small depth of field is small aperture in the camera setting when the picture is taken small part will be non blurred while the other stuff wont be in focus

3 image of large depth of field

4-a large depth of field is when the aperture is a high number more will be in focus in the picture

5-exposure is how much light will be in your photo

6-emphasis an line like a horizon in the picture

7 -to change the depth of field you would need to go to the settings and change the f stops bye rotating the dial to your desired number