The document discusses various techniques of film editing including:
1) Classical cutting which involves editing for dramatic intensity through carefully selecting shots to shift the viewer's perspective.
2) Thematic montage which stresses associations of ideas through parallel editing of different scenes.
3) Eisenstein's concept of montage where editing captures dialectical conflicts through opposing visuals, sounds, and actions. He used this in Battleship Potemkin's famous "Odessa Steps" scene.
4) Surrealist films like Un Chien Andalou which use random, abstract imagery in montage with no narrative logic.