A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

{verbatim} is about macros and environments like “\verb” and “verbatim” which implement some form of verbatim mode, i.e. change the {catcodes}. A popular package is {fancyvrb}. For questions about the…
{hyphenation} is about controlling hyphenation in (La)TeX documents.
{geometry} is a package that allows to change the margins of (whole) pages and, conversely, the width and height of the textblock and its positioning on the page.
{expansion} is about expanding tokens, including the manipulation of expansion order and the suppressing of expansion.
{array} is an environment used in {math-mode}. It can be useful when aligning terms.
1034 questions
{languages} is about the specifics of using languages in (La)TeX documents, e.g. about switching {naming} and {hyphenation} patterns when typesetting multilingual documents. Popular packages are {babe…
1027 questions
{punctuation} is for questions involving the typesetting of punctuation marks. If your question relates to punctuation in particular document parts such as e.g. bibliography formatting or section form…
1020 questions
{appendices} is about creating and customizing an appendix or multiple (sub)appendices with the help of the `\appendix` command or the `appendix` package.
1017 questions
{minted} is a package that facilitates expressive syntax highlighting in LaTeX using the powerful Pygments library. The package provides options to customize the highlighted source code output using {…
{subcaption} is a package for typesetting captions of {subfloats}.
981 questions
{IEEEtran} is a document class for IEEE Transactions journals and conferences.
976 questions
{math-operators} is about operators in math mode. These include sums, integrals and similar, text operators like sin, cos, etc.
for general LaTeX questions. {latex3} is about the new material being developed by the LaTeX3 project. This includes the expl3 programming language along with higher-level c…
TeX4ht is a highly configurable TeX-based authoring system dedicated mainly to produce hypertext.
the {exam} document class provides a number of useful features for typesetting exams - in particular it provides a `Question` environment with `parts`, and can keep track of points
{bold} is specifically about making document elements bold (or removing this font attribute). For general questions about formatting document elements, use {formatting} instead.
909 questions
{cleveref} is a package that enhances LaTeX's {cross-referencing} features, allowing the format of references to be determined automatically according to the type of reference.
905 questions
Polyglossia is a replacement for {babel} for use with XeLaTeX and LuaLaTeX. It provides multilingual support for most languages and handles automatic script changing using the {fontspec} package.
{3d} is about three-dimensional content, e.g., images and drawings.
{acronyms} is about formatting acronyms and abbreviations using customized commands or specific packages like acronym or {glossaries}.
893 questions
{rules} is about drawing lines (also called rules). Popular packages are {booktabs} (which provides high quality table rules) and {dashrule}.
{unicode-math} provides an implementation of Unicode math symbols and OpenType math fonts for XeLaTeX and LuaLaTeX.
888 questions
{tikz-cd} concerns commutative diagrams produced by the tikz-cd package.
{rotating} is for general questions about rotating document elements as well as for questions about the `rotating` package and its `sidewaysfigure` and `sidewaystable` (floating) environments. For gen…
{apa-style} is about bibliography questions using the style of the American Psychological Association. Use this tag in addition to the tag for the specific package you use to implement the style.
872 questions
{columns} is specifically about columns in {tables} (though often the latter tag will suffice). If your question is about {two-column} documents or the {multicol} package, use the respective tag inste…
872 questions
{forest} is about trees in {diagrams} created with the forest package. It is built upon {tikz-pgf}.
872 questions
{input} is about the \input command which makes LaTeX process the content of a given file basically the same way as if it would be written instead of \input.
852 questions
Plain TeX is Knuth's original default format for TeX documents.
850 questions
{brackets} is about different brackets, their usage and functionality in (La)TeX.
{windows} is for questions which are specific for the Microsoft Windows operating systems. Questions regarding MikTeX, a popular TeX distribution for Windows, should be tagged with {miktex} instead.
829 questions
{foreach} is for questions regarding the TikZ/PGF module of the same name which can also be used as a standalone package pgffor.
824 questions
{pdfpages} is a package that simplifies the inclusion of external multi-page PDF documents in LaTeX documents.
824 questions
{overlays} is a term used by the {beamer} document class to describe the layering of slides.
{mdframed} is a package for creating framed boxes that can break across pages.
{warnings} is about dealing with and (hopefully) getting rid of compiler warnings.
790 questions
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