Formatting refers to the general organization and look of text in a document. It includes things like indentation, new paragraphs, headings, subheadings, font style, size, and color. The three main formatting options are plain text, bold text, and italicized text. Plain text has no additional attributes other than these. Bold text is written in another font or color, or both. Italicized text is written in another font but with italicized tags. Users can also create their own formatting styles by using template files provided by Microsoft or others. These can be applied to any section of a document easily by simply selecting them from a list. Documents can have many formats. Some common ones include: Word documents - Microsoft's standard format for writing papers and reports. Word documents use a.doc extension. Excel spreadsheets - Users can write down calculations and formulas in cells and then link them together to create more advanced functions. Excel documents use a.xls extension. PowerPoint presentations - Slides can contain drawings, photos, and videos along with regular text. Presentations use a.ppt extension.