LaTeX Document Classes Reference

\documentclass[options]{article}

% Best for:
% - Research papers
% - Journal articles
% - Reports (short)
% - Homework assignments
% - Essays

% Structure hierarchy:
% \section{}
% \subsection{}
% \subsubsection{}
% \paragraph{}
% \subparagraph{}

\begin{document}
\title{Article Title}
\author{Author Name}
\date{\today}
\maketitle

\begin{abstract}
Abstract content for articles.
\end{abstract}

\section{Introduction}
Article content starts here.

\section{Main Content}
More sections as needed.

\section{Conclusion}
Final thoughts.

\end{document}

\documentclass[options]{report}

% Best for:
% - Technical reports
% - Theses (shorter)
% - Project documentation
% - Lab reports
% - User manuals

% Structure hierarchy:
% \chapter{}
% \section{}
% \subsection{}
% \subsubsection{}
% \paragraph{}
% \subparagraph{}

\begin{document}
\title{Report Title}
\author{Author Name}
\date{\today}
\maketitle

\begin{abstract}
Abstract for reports.
\end{abstract}

\tableofcontents

\chapter{Introduction}
First chapter content.

\chapter{Methodology}
Second chapter content.

\chapter{Results}
Third chapter content.

\chapter{Conclusion}
Final chapter content.

\end{document}

\documentclass[options]{book}

% Best for:
% - Books
% - Long theses/dissertations
% - Textbooks
% - Multi-volume works
% - Complex documents

% Structure hierarchy:
% \part{}
% \chapter{}
% \section{}
% \subsection{}
% \subsubsection{}
% \paragraph{}
% \subparagraph{}

\begin{document}

\frontmatter  % Roman page numbers, no chapter numbers
\title{Book Title}
\author{Author Name}
\date{\today}
\maketitle

\tableofcontents
\listoffigures
\listoftables

\mainmatter   % Arabic page numbers, normal numbering
\part{First Part}

\chapter{Introduction}
Chapter content begins here.

\chapter{Background}
More content here.

\backmatter   % No chapter numbers
\appendix
\chapter{Additional Information}

\bibliographystyle{plain}
\bibliography{references}

\end{document}

\documentclass[options]{beamer}

% Best for:
% - Conference presentations
% - Lecture slides
% - Academic talks
% - Business presentations

% Slide structure:
% \frame{} or \begin{frame}...\end{frame}
% \section{} for navigation
% \subsection{} for organization

\usetheme{Warsaw}  % Choose theme
\usecolortheme{dolphin}  % Choose colors

\title{Presentation Title}
\author{Author Name}
\institute{Institution}
\date{\today}

\begin{document}

\frame{\titlepage}

\begin{frame}
\frametitle{Outline}
\tableofcontents
\end{frame}

\section{Introduction}
\begin{frame}
\frametitle{Introduction}
\begin{itemize}
  \item First point
  \item Second point
  \item<2-> This appears on second click
\end{itemize}
\end{frame}

\section{Main Content}
\begin{frame}
\frametitle{Main Points}
Content of the slide here.
\end{frame}

\end{document}

\documentclass[options]{letter}

% Best for:
% - Business letters
% - Formal correspondence
% - Cover letters
% - Official documents

\usepackage[utf8]{inputenc}

\signature{Your Name}
\address{Your Address\\City, State ZIP}

\begin{document}

\begin{letter}{Recipient Name\\Recipient Address\\City, State ZIP}

\opening{Dear Sir or Madam,}

Body of the letter goes here. Multiple paragraphs
are separated by blank lines.

This is the second paragraph of the letter.

\closing{Sincerely,}

\ps{P.S. Additional note here.}

\encl{Enclosure list}

\end{letter}
\end{document}

% Available font sizes
\documentclass[10pt]{article}  % 10pt (default)
\documentclass[11pt]{article}  % 11pt
\documentclass[12pt]{article}  % 12pt

% Font size affects:
% - Body text size
% - Section heading sizes
% - Math formula sizes
% - Footnote sizes

% US paper sizes
\documentclass[letterpaper]{article}  % 8.5 × 11 inches (default)
\documentclass[legalpaper]{article}   % 8.5 × 14 inches
\documentclass[executivepaper]{article} % 7.25 × 10.5 inches

% International paper sizes
\documentclass[a4paper]{article}      % 210 × 297 mm
\documentclass[a5paper]{article}      % 148 × 210 mm
\documentclass[b5paper]{article}      % 176 × 250 mm

% Custom paper size (with geometry package)
\usepackage[paperwidth=8in,paperheight=10in]{geometry}

% Page orientation
\documentclass[landscape]{article}    % Landscape orientation
\documentclass[portrait]{article}     % Portrait (default)

% Columns
\documentclass[onecolumn]{article}    % Single column (default)
\documentclass[twocolumn]{article}    % Two columns

% Sides
\documentclass[oneside]{article}      % Single-sided (default for article)
\documentclass[twoside]{book}         % Double-sided (default for book)

% Draft mode
\documentclass[draft]{article}        % Shows overfull boxes, faster compilation
\documentclass[final]{article}        % Final mode (default)

% Title page behavior
\documentclass[titlepage]{article}    % Separate title page
\documentclass[notitlepage]{report}   % Title on first page

% Abstract behavior (for article)
\documentclass[onecolumn]{article}    % Abstract spans full width
\documentclass[twocolumn]{article}    % Abstract spans both columns

% Equation numbering
\documentclass[leqno]{article}        % Equation numbers on left
\documentclass[reqno]{article}        % Equation numbers on right (default)

% Equation formatting
\documentclass[fleqn]{article}        % Left-aligned equations
% Default: centered equations

% Bibliography formatting
\documentclass[openbib]{article}      % Open bibliography format
% Default: closed bibliography format

% File: myclass.cls
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{myclass}[2024/01/01 My Custom Class]

% Based on article class
\LoadClass[11pt,a4paper]{article}

% Required packages
\RequirePackage{geometry}
\RequirePackage{fancyhdr}
\RequirePackage{graphicx}

% Page layout
\geometry{margin=1in}

% Custom commands
\newcommand{\institution}[1]{\def\@institution{#1}}
\newcommand{\course}[1]{\def\@course{#1}}

% Custom title format
\renewcommand{\maketitle}{
  \begin{center}
    {\LARGE\bfseries\@title}\\[1em]
    {\large\@author}\\
    {\large\@institution}\\
    {\large\@course}\\
    {\large\@date}
  \end{center}
}

% University-specific thesis classes
\documentclass{phdthesis}     % PhD thesis
\documentclass{msthesis}      % Master's thesis
\documentclass{ucthesis}      % UC system thesis

% Generic thesis classes
\documentclass[thesis]{memoir}
\documentclass{scrbook}       % KOMA-Script book class

% Configuration example
\documentclass[12pt,oneside,openright]{report}
\usepackage[margin=1.5in,left=2in]{geometry}
\usepackage{setspace}
\doublespacing

% IEEE papers
\documentclass{IEEEtran}

% ACM papers
\documentclass{acmart}

% Springer papers
\documentclass{llncs}         % Lecture Notes in Computer Science
\documentclass{svjour3}       % Springer journals

% Elsevier papers
\documentclass{elsarticle}

% AMS papers
\documentclass{amsart}

% KOMA-Script equivalents
\documentclass{scrartcl}      % Instead of article
\documentclass{scrreprt}      % Instead of report
\documentclass{scrbook}       % Instead of book
\documentclass{scrlttr2}      % Instead of letter

% Enhanced features
\documentclass[
  fontsize=11pt,
  paper=a4,
  twoside=false,
  titlepage=false,
  headings=small
]{scrartcl}

% KOMA options
\KOMAoptions{
  DIV=12,                     % Text area calculation
  BCOR=8mm,                   % Binding correction
  headinclude=true,           % Include header in text area
  footinclude=false           % Exclude footer from text area
}

\documentclass[11pt,a4paper,oneside]{memoir}

% Page layout
\settrimmedsize{297mm}{210mm}{*}  % A4 paper
\setlength{\trimtop}{0pt}
\setlength{\trimedge}{\stockwidth}
\addtolength{\trimedge}{-\paperwidth}
\settypeblocksize{634pt}{448.13pt}{*}
\setulmargins{4cm}{*}{*}
\setlrmargins{2.5cm}{*}{*}
\checkandfixthelayout

% Chapter styles
\chapterstyle{veelo}          % Pre-defined style
% or create custom style
\makechapterstyle{custom}{
  \renewcommand{\chapternamenum}{}
  \renewcommand{\printchaptername}{}
  \renewcommand{\printchapternum}{\chapnumfont\thechapter\space}
  \renewcommand{\afterchapternum}{}
}