The postproduction period (often just called post, as in, “We’re scheduled for eight weeks of post”) generally begins once the principal shooting is completed. On many films, the editor works during production, cutting as soon as each scene is shot, which can give the director and crew feedback in time to make corrections. On other projects, editing starts after the shooting stops. Editing is done to condense what is typically many hours’ worth of raw film or digital footage into a watchable movie. It is usually in the editing room that the project can be seen in its entirety for the first time. Movies are often substantially rearranged and reworked during editing. Documentaries often find their structure and shape in the editing room, not from a preplanned script. The first edited version of a movie is the assembly or string-out (all the scenes in order). The assembly is condensed into a rough cut, which is then honed to a fine cut. When a satisfactory version is complete (called picture lock), the various stages of finishing take place. This may include scoring with original music or adding prerecorded music; sound editing (to clean up and enhance the sound track); sound mix (to balance and perfect the sound); and creating titles and any visual effects that weren’t done earlier.