The appearance of your document is determined by the style you choose. A style is a collection of commands that define all aspects of the appearance of your document. The style determines the type face, type size, page size, line spacing, location and appearance of headers and footers, page numbering, page breaks, centering, section headings, and many other typographic fine points.
You can modify the style to change the appearanceTag_appearance.tex of an element during the current editing session or to change the appearance of the element for all documents created with the style. You can also create a new styleCreate_style.tex to produce documents that fit your formatting requirements.