XeTeX allows the use of OpenType and TrueType (that is, outlined) fonts for output files.The writer uses markup tagging conventions to define the general structure of a document (such as article, book, and letter), to stylise text throughout a document (such as bold and italics), and to add citations and cross-references.A TeX distribution such as TeX Live or MikTeX is used to produce an output file (such as PDF or DVI ) suitable for printing or digital distribution.It also has a prominent role in the preparation and publication of books and articles that contain complex multilingual materials, such as Sanskrit and Greek.
LaTeX uses the TeX typesetting program for formatting its output, and is itself written in the TeX macro language. In the latter role, for example, it is sometimes used as part of a pipeline for translating DocBook and other XML -based formats to PDF. The typesetting system offers programmable desktop publishing features and extensive facilities for automating most aspects of typesetting and desktop publishing, including numbering and cross-referencing of tables and figures, chapter and section headings, the inclusion of graphics, page layout, indexing and bibliographies. In essence, TeX handles the layout side, while LaTeX handles the content side for document processing. ![]() LaTeX is free software and is distributed under the LaTeX Project Public License (LPPL). In preparing a LaTeX document, the author specifies the logical structure using simple, familiar concepts such as chapter, section, table, figure, etc., and lets the LaTeX system handle the formatting and layout of these structures. Latex Manual Typesetting AdjustmentsAs a result, it encourages the separation of the layout from the content while still allowing manual typesetting adjustments whenever needed. This concept is similar to the mechanism by which many word processors allow styles to be defined globally for an entire document, or the use of Cascading Style Sheets in styling HTML documents. Such macros are often collected into packages, which could then be made available to address some specific typesetting needs such as the formatting of complex mathematical expressions or graphics 6 (e.g., the use of the align environment provided by the amsmath package to produce aligned equations). Then you give your document.tex file as input to the TeX program (with the LaTeX macros loaded), which prompts TeX to write out a file suitable for onscreen viewing or printing. This write-format-preview cycle is one of the chief ways in which working with LaTeX differs from the What-You-See-Is-What-You-Get (WYSIWYG) style of document editing. It is similar to the code-compile-execute cycle known to the computer programmers. Today, many LaTeX-aware editing programs make this cycle a simple matter through the pressing a single key, while showing the output preview on the screen beside the input window. Some online LaTeX editors even automatically refresh the preview, 12 13 14 while other online tools provide incremental editing in-place, mixed in with the preview in a streamlined single window. Lamport remarks that TeX is usually pronounced tech, making lah -teck, lah- teck, and lay -teck the logical choices; but language is not always logical, so lay-tecks is also possible. In media where the logo cannot be precisely reproduced in running text, the word is typically given the unique capitalization LaTeX. Alternatively, the TeX, LaTeX 18 and XeTeX 19 logos can also be rendered via pure CSS and XHTML for use in graphical web browsers by following the specifications of the internal LaTeX macro. The LPPL is DFSG compliant as of version 1.3. As free software, LaTeX is available on most operating systems, which include UNIX ( Solaris, HP-UX, AIX ), BSD ( FreeBSD, macOS, NetBSD, OpenBSD ), Linux ( Red Hat, Debian, Arch, Gentoo ), Windows, DOS, RISC OS, AmigaOS and Plan9. There are many other macro packages for TeX, including Plain TeX, GNU Texinfo, AMSTeX, and ConTeXt. Different implementations of each of these steps are typically available in TeX distributions. Traditional TeX will output a DVI file, which is usually converted to a PostScript file. ![]() The XeTeX engine developed by Jonathan Kew, on the other hand, merges modern font technologies and Unicode with TeX.
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