The document outlines several codes and conventions for interviewing experts in documentaries. It discusses positioning the expert off to one side of the frame to directly address the audience. It recommends a medium close-up shot to show the expert's facial expressions and relevant details of their appearance and environment. The expert should not look directly at the camera but rather at the interviewer to maintain a conversational tone. Cutaways and b-roll footage are suggested to maintain audience interest. Text with the expert's name, title, and relevance should appear during their segments. Only the expert's answers should be included, not the questions, for a smoother flow.