This document describes several styles and techniques used in documentaries. It discusses fully narrated documentaries that rely heavily on voiceover, fly-on-the-wall documentaries that have no interference or commentary, and mixed documentaries that use a combination of interviews and narration. It also outlines self-reflexive, docu-drama, docu-soap, and current affairs styles. Additionally, it explains several conventions for structuring documentaries, including using a narrative with a beginning, middle, end, conflict, and movement.