LaTeX, which is pronounced «Lah-tech» or «Lay-tech» (to rhyme with «blech» or «Bertolt Brecht»), is a document preparation system for high-quality typesetting.

Oct 30, 2025 · LaTeX is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation. LaTeX is the de facto standard for the …

This page contains references to core documentation about LaTeX written by the LaTeX team. Articles on specific topics, talks, etc. can be found on the publication page indexed by topic.

A while ago we made the decision to drop the idea of a separate LaTeX3 format that would exist in parallel to LaTeX2e, but instead decided to gradually modernize LaTeX to keep it …

Most of the LaTeX code is directly available and automatically kept up-to-date through all major TeX distributions so you just get it automatically (or manually) through the update mechanism …

The standard LTEX format declares the OT1 and T1 text encodings by inputting the files ot1enc.def and t1enc.def; it also sets up various defaults which require that OT1-encoded …

Starting with the 2015/01/01 release we provide a "latexrelease" package that allows you to emulate older (or newer) versions of the format without regenerating it from scratch; see …

Feb 2, 2020 · Currently, LaTeX is tested by us with three engines: pdfTeX, XeTeX and LuaTeX. LuaTeX is the most modern engine, with best flexibility to produce tagging structures. As noted …

These commands are used in the \sectionmark definition of the page styles (see section 6.4.2) Most of them are already defined \subsectionmark by the LATEX format, so they are only …

If you install a version of LATEX with a locally configured font set-up then this system is likely to produce documents that are no longer ‘formatting compat- ible’; for example, the use of …