How many shutters and apertures are used to take portraits in the studio?

Aperture and shutter are a combination. As for the combination, it depends on what your movie wants to express. To show a certain point or close-up, use a large aperture, use a high-speed shutter to take a clear panoramic view, and then use a small aperture to slow down.

In the later period, strictly speaking, pixels and depth of field are not adjustable.

The position of light is still the same sentence, depending on what you want to express and how you feel. Generally, one is the main light and the other is the auxiliary light or background light. The arrangement of the lights is too complicated. Read related books. This is not clear in a few words.