featured >3 last posts (from a specific category)

Hello friends! We know that the Custom Community theme allows you to emphasize the last three posts. These posts are located below the slideshow. I would change this rule (the command?). I would like to dedicate this area to another content type. Instead of listing only the last 3 posts, I want to appear in the last 3 posts from a specific category. How could I do this?

help me