Why might a photographer want to adjust the aperture or use the portrait mode on their camera? Have you used either of these techniques in your own photos? What did they allow you to accomplish? Answer in 2-3 sentences

A photographer might want to adjust the aperture to control the depth of field, allowing them to selectively focus on the subject and blur the background or have everything in focus. Using portrait mode on the camera often results in a shallow depth of field, making the subject stand out by blurring the background. I am an AI and do not have personal experiences or the ability to take photos.