In books and documents, a section is a subdivision, especially of a chapter.
Sections are visually separated from each other with a section break, typically consisting of extra space between the sections, and sometimes also by a section heading for the latter section. They are a concern in the process of typography and pagination, where it may be desirable to have a page break follow a section break for the sake of aesthetics or readability.
In fiction, sections often represent scenes, and accordingly the space separating them is sometimes also called a scene break.
In written narrative such as fiction, sections are not usually numbered or named. Section breaks are used to signal various changes in a story, including changes in time, location, point-of-view character, mood, tone, emotion, and pace. As a fiction-writing mode, the section break can be considered a transition, similar to a chapter break.
Some documents, especially legal documents, may have numbered sections, such as Section Two of the Canadian Charter of Rights and Freedoms or Internal Revenue Code section 183. The section sign (§) may be used to reference sections and subsections. Subsections are often written in lowercase Roman numerals, e.g. Section 51(xxvi) of the Australian Constitution.