Welcome to the help browser. It includes a general LaTeX Reference and even more detailed Package Documentation.
This is the "LaTeX2e unofficial reference manual (October 2018)", see About this document for details.
Overview of LaTeX
Starting and ending, Output files, TeX engines, LaTeX command syntax, Environment, CTAN: the Comprehensive TeX Archive Network
Document classes
Document class options, Additional packages, Class and package construction
Fonts
Font styles, Font sizes, Low-level font commands
Layout
\onecolumn
, \twocolumn
, \flushbottom
, \raggedbottom
, Page layout parameters, Floats
Sectioning
\part
, \chapter
, \section
, \subsection
, \subsubsection
, \paragraph
, \subparagraph
, \appendix
, \frontmatter
, \mainmatter
, \backmatter
, \@startsection
Cross references
\label
, \pageref
, \ref
Environments
abstract
, array
, center
, description
, displaymath
, document
, enumerate
, eqnarray
, equation
, figure
, filecontents
: Write an external file, flushleft
, flushright
, itemize
, letter
environment: writing letters, list
, math
, minipage
, picture
, quotation
& quote
, tabbing
, table
, tabular
, thebibliography
, theorem
, titlepage
, verbatim
, verse
Line breaking
\\
, \obeycr
& \restorecr
, \newline
, \-
(discretionary hyphen), \discretionary
(generalized hyphenation point), \fussy
& \sloppy
, \hyphenation
, \linebreak
& \nolinebreak
Page breaking
\clearpage
& \cleardoublepage
, \newpage
, \enlargethispage
, \pagebreak
& \nopagebreak
Footnotes
\footnote
, \footnotemark
, \footnotetext
, Footnotes in section headings, Footnotes in a table, Footnotes of footnotes
Definitions
\newcommand
& \renewcommand
, \providecommand
, \makeatletter
& \makeatother
, \@ifstar
, \newcounter
: Allocating a counter, \newlength
, \newsavebox
, \newenvironment
& \renewenvironment
, \newtheorem
, \newfont
, \protect
, \ignorespaces & \ignorespacesafterend
Counters
\alph \Alph \arabic \roman \Roman \fnsymbol
: Printing counters, \usecounter
, \value
, \setcounter
, \addtocounter
, \refstepcounter
, \stepcounter
, \day
& \month
& \year
Lengths
Units of length, \setlength
, \addtolength
, \settodepth
, \settoheight
, \settowidth
Making paragraphs
\par
, \indent
& \noindent
, \parindent
& \parskip
, Marginal notes
Math formulas
Subscripts & superscripts, Math symbols, Math functions, Math accents, Over- and Underlining, Spacing in math mode, Math miscellany
Modes
\ensuremath
Page styles
\maketitle
, \pagenumbering
, \pagestyle
, \thispagestyle
Spaces
\enspace
& \quad
& \qquad
, \hspace
, \hfill
, \hss
, \spacefactor
, Backslash-space, \
, ~
, \thinspace
& \negthinspace
, \/
, \hrulefill
& \dotfill
, \bigskip
& \medskip
& \smallskip
, \bigbreak
& \medbreak
& \smallbreak
, \strut
, \vspace
, \vfill
, \addvspace
Boxes
\mbox
& \makebox
, \fbox
& \framebox
, \parbox
, \raisebox
, \sbox
& \savebox
, lrbox
, \usebox
Color
color
package options, Color models, Commands for color, Define colors, Colored text, Colored boxes, Colored pages
Graphics
graphics
package options, graphics
package configuration, Commands for graphics, \includegraphics
, \rotatebox
, \scalebox
, \resizebox
Special insertions
Reserved characters, Upper and lower case, Symbols by font position, Text symbols, Accents, Additional Latin letters, \rule
, \today
Splitting the input
\endinput
, \include
& \includeonly
, \input
Front/back matter
Table of contents etc., Indexes, Glossaries
Letters
\address
, \cc
, \closing
, \encl
, \location
, \makelabels
, \name
, \opening
, \ps
, \signature
, \telephone
Terminal input/output
\typein
, \typeout
Command line
Command line options, Command line input, Recovering from errors
Appendix: Document templates
beamer
, article
, book
, ...
amsfonts
Additional math fonts from AMS.
amsmath
Mathematics package from AMS.
amsthm
Math theorems setting package from AMS.
babel
Multilingual documents.
braket
Dirac braket and set notations.
calc
Simple arithmetic in LaTeX commands.
color
Foreground and background colors.
colortbl
Colored tables.
enumerate
Enumerate with redefinable labels.
geometry
Interface to document dimensions.
glossaries
Create a glossary for your document.
graphicx
Include graphics in your document.
hyperref
Create hyperlinks within your document.
ifthen
Conditional commands.
listings
Provides a listing environment for embedding programming code.
natbib
Additional bibliography and citations styles.
parskip
Paragraphs without indentation.
pgfplots
Create plots in two and three dimensions.
theorem
Theorem environments (like "definition", "lemma", ...) with custom styling.
TikZ & PGF
Graphics and plotting.
transparent
Set transparency for sections in your document.
url
Type urls with the \\url{..} command without escaping them.
xcolor
Enables colored text and more.