LyX

{{Short description|Document processing software}}

{{Use dmy dates|date=January 2021}}

{{redirect|LYX|the engine variant|GM small gasoline engine#LYX|the airport with IATA code LYX |Lydd Airport}}

{{Infobox software

| name = LyX

| title = LYX

| logo = LyXbanner1.6.3.png

| screenshot = LyX 2.3.6 - toolbars multiscript biblatex equation miniboxes - Fedora Linux 2021-01.png

| caption = Screenshot of LyX 2.3.6 on Linux

| collapsible =

| author =

| developer = The LyX Team

| released = {{start date and age|1995}}

| discontinued =

| latest release version = {{wikidata|property|references|preferred|edit|P348|P548=Q2804309}}

| latest release date = {{Start date and age|{{wikidata|qualifier|preferred|single|P348|P548=Q2804309|P577}}}}

| programming language = C++, Qt 5{{Cite web|url=https://wiki.lyx.org/LyX/NewInLyX22|title=LyX wiki | LyX / New in LyX 2.2|website=wiki.lyx.org}}

| operating system = ChromeOS, Linux, Mac, Windows

| platform =

| size =

| language count = 25

| language = Arabic, Basque, Brazilian Portuguese, Bulgarian, Czech, Dutch, Finnish, French, German, Hungarian, Indonesian, Interlingua, Italian, Japanese, Norwegian (Bokmål), Norwegian (Nynorsk), Polish, Portuguese, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Traditional Chinese, Ukrainian

| genre = Document processor

| license = GPL-2.0-or-later

| website = {{Official URL}}

}}

LyX (styled as LYX; pronounced {{IPA|de|ˈlɪks|}}{{Cite web |title=LyX Wiki: Pronunciations |url=https://wiki.LyX.org/FAQ/Pronunciation#lyx |website=wiki.lyx.org}}) is an open source, graphical user interface document processor based on the LaTeX typesetting system. Unlike most word processors, which follow the WYSIWYG ("what you see is what you get") paradigm, LyX has a WYSIWYM ("what you see is what you mean") approach, where what shows up on the screen roughly depicts the semantic structure of the page and is only an approximation of the document produced by TeX.

Since LyX relies on the typesetting system of LaTeX without being a full-fledged LaTeX editor itself, it has the power and flexibility of LaTeX, and can handle documents including books, notes, theses, academic papers, letters, etc. LyX's interface is structured so that while knowledge of the LaTeX markup language is not necessary for basic usage, new LaTeX directives can be added into the document to support more complex features during editing — though not at the level of full control a full-fledged LaTeX editor can provide.{{Cite web|url=https://www.lyx.org/Features|title=LyX {{!}} Features|website=www.lyx.org|access-date=15 July 2019}}{{Cite web|url=https://tex.meta.stackexchange.com/questions/1883/is-lyx-an-editor-which-should-be-recommended|title=Is LyX an editor which should be recommended?|website=TeX - LaTeX Meta Stack Exchange|access-date=15 July 2019}}{{Cite web|url=https://tex.stackexchange.com/questions/18199/what-are-the-benefits-and-drawbacks-of-lyx-compared-to-texniccenter|title=editors - What are the benefits and drawbacks of Lyx compared to TeXnicCenter|website=TeX - LaTeX Stack Exchange|access-date=15 July 2019}}

LyX is popular among technical authors and scientists for its advanced mathematical modes, though it is increasingly used by non-mathematically-oriented scholars as well{{Cite web|url=https://wiki.lyx.org/LyX/LinguistLyX|title=LyX wiki | LyX / Using LyX for Linguistic Papers|website=wiki.lyx.org}}{{Cite web|url=https://wiki.lyx.org/LyX/HumanitiesLyX|title=LyX wiki | LyX / HumanitiesLyX|website=wiki.lyx.org}} for its bibliographic database integration and its ability to manage multiple files. LyX has also become a popular publishing tool among self-publishers.{{Cite web|url=https://www.linuxjournal.com/article/9085|title=LyX and Lulu | Linux Journal|website=www.linuxjournal.com}}{{Cite web|url=https://wiki.lyx.org/LyX/ProducedPublications|title=LyX wiki | LyX / ProducedPublications|website=wiki.lyx.org}}

LyX is available for all major operating systems, including Windows, MacOS, Linux, UNIX, ChromeOS, OS/2 and Haiku. LyX can be redistributed and modified under the terms of the GNU General Public License and is thus free software.