Overleaf Tutorial

Every year, thousands of researchers submit journal papers, theses, and dissertations that look identical in content but worlds apart in presentation. The difference, more often than not, comes down to whether they used LaTeX or not—and increasingly, whether they wrote that LaTeX in Overleaf. Overleaf is a browser-based collaborative LaTeX editor used by over twelve million researchers, students, and academics worldwide. It eliminates the installation barrier of traditional LaTeX while adding real-time collaboration, cloud compilation, and a template library that covers everything from IEEE conference papers to PhD theses. This tutorial takes you from creating your first account to submitting a polished, fully cited, properly formatted academic document—covering every tool, every command, and every workflow decision along the way.

What Is Overleaf and Why Academics Use It

Overleaf is a cloud-based LaTeX editor that runs entirely in your browser. Unlike traditional LaTeX workflows—which require installing a full TeX distribution (TeX Live or MiKTeX), a separate editor (TeXstudio, Emacs), and managing packages manually—Overleaf handles all of this on its servers. You open a browser, write your document, click compile, and get a PDF. That simplicity, combined with real-time collaboration and a library of thousands of templates, explains why Overleaf has become the default tool for academic writing in science, technology, engineering, and mathematics (STEM) disciplines and increasingly in social sciences and humanities as well.

LaTeX vs Word: Why the Choice Matters

The question academics most frequently ask is whether LaTeX and Overleaf are worth learning when Microsoft Word already produces documents. The answer depends on what you are writing. For short documents—essays, memos, brief reports—Word is perfectly adequate. For long-form academic documents—dissertations, journal articles, books with complex mathematical content—LaTeX’s advantages become decisive.

Who Should Use Overleaf

Account Setup and the Overleaf Interface

Getting started requires nothing more than an email address. Go to overleaf.com and register with your email, Google account, Twitter/X, or ORCID. If your institution has an Overleaf licence—which many universities do—log in through your institution for access to Professional features at no personal cost. Check your university’s software portal or library website for institutional Overleaf access before creating a personal account.

Free vs Paid Plans

The Overleaf Interface: Five Key Panels

Creating and Structuring Your First Project

From the Overleaf dashboard, click New Project. You have four options: Blank Project (empty .tex file), Example Project (pre-filled with common elements), Upload Project (ZIP file of existing files), or choose from Templates. For learning purposes, start with Blank Project, name it, and click Create.

Starting from a Blank Project

A blank Overleaf project opens with a minimal main.tex file containing just the document class declaration and empty document environment. Here is what a minimal working document looks like:

\documentclass{article}

% Preamble — packages and settings go here
\usepackage{amsmath}   % Mathematical environments
\usepackage{graphicx}  % Include images
\usepackage{hyperref}  % Clickable links in PDF

\title{My First Overleaf Document}
\author{Your Name}
\date{\today}

\begin{document}

\maketitle

\begin{abstract}
This is the abstract of my document. It summarises the main content.
\end{abstract}

\section{Introduction}
This is the introduction. LaTeX automatically numbers sections.

\section{Conclusion}
This is the conclusion.

\end{document}

Press Ctrl+Enter (or click the green Compile button) to compile this. Overleaf sends the source to its TeX Live server, compiles it, and returns the PDF—all in a few seconds. The PDF panel on the right updates automatically.

Uploading an Existing Project

If you have LaTeX files from another editor or collaborator, click New Project → Upload Project. Create a ZIP archive of all your project files (the .tex file, images folder, .bib file, any custom style files) and upload the ZIP. Overleaf preserves the folder structure. After upload, set the main file by right-clicking it in the file tree and selecting “Set as Main File.”

LaTeX Fundamentals Every Overleaf User Needs

LaTeX is a markup language: you write text with embedded commands that describe structure and formatting, and the LaTeX engine renders the result. Commands begin with a backslash (\) and take arguments in curly braces ({}). Optional arguments go in square brackets ([]). Understanding this syntax removes the mystery from every LaTeX command you encounter.

The Anatomy of a LaTeX Command

\commandname[optional argument]{required argument}

% Examples:
\textbf{bold text}                    % Bold formatting
\textit{italic text}                   % Italic formatting
\section{Section Title}               % Numbered section heading
\section*{Unnumbered Section}        % Starred version: no number
\includegraphics[width=0.8\textwidth]{figure.pdf}  % Image with optional width
\cite{smith2022}                    % In-text citation

Environments

Environments are blocks of content that receive special treatment. Every environment opens with \begin{environmentname} and closes with \end{environmentname}. The document environment wraps your entire document. Other environments handle figures, tables, equations, lists, and more. Mismatched begin/end pairs are the most common source of compilation errors.

% Itemised (bullet) list
\begin{itemize}
    \item First item
    \item Second item
    \item Third item
\end{itemize}

% Numbered (enumerated) list
\begin{enumerate}
    \item First step
    \item Second step
\end{enumerate}

% Abstract environment (article class)
\begin{abstract}
    Your abstract text here.
\end{abstract}

% Verbatim (code/text as-is, no LaTeX processing)
\begin{verbatim}
    This text appears exactly as typed, \commands ignored.
\end{verbatim}

Special Characters and Escaping

Several characters have special meaning in LaTeX and cannot be typed directly in text. They must be escaped with a backslash or replaced with a command.

Document Structure and Classes

The first line of every LaTeX document declares its class with \documentclass{}. The document class defines the overall layout, available commands, and default formatting. Choosing the right class is the first structural decision in any Overleaf project.

Standard Document Classes

\documentclass[12pt, a4paper, twocolumn]{article}

\documentclass[12pt, a4paper, oneside]{report}

\documentclass{beamer}
\usetheme{Madrid}
\begin{frame}{Slide Title}
    Slide content here.
\end{frame}

Sectioning Commands

LaTeX handles headings and numbering automatically. You declare the heading level; LaTeX numbers it, adds it to the table of contents, and applies consistent formatting. The starred version (with *) suppresses numbering and excludes the heading from the table of contents.

\section{Top-Level Heading}          % 1, 2, 3 ...
\subsection{Second-Level Heading}    % 1.1, 1.2 ...
\subsubsection{Third-Level}          % 1.1.1, 1.1.2 ...
\paragraph{Named Paragraph}          % Inline heading
\subparagraph{Sub-paragraph}

% In report/book class, add:
\chapter{Chapter Title}              % Chapter 1, Chapter 2 ...

% Table of contents (place after \maketitle)
\tableofcontents
\newpage

Cross-References: Labels and Refs

One of LaTeX’s most powerful features is automatic cross-referencing. Place a \label{key} after any numbered element (section, figure, table, equation), then reference it anywhere in the document with \ref{key}. LaTeX maintains all reference numbers automatically—if you add a new section before Section 3, what was Section 3 becomes Section 4, and every \ref{} pointing to it updates automatically in the next compilation.

\section{Methodology}\label{sec:methodology}

As described in Section~\ref{sec:methodology}, the approach...

% The tilde ~ prevents a line break between "Section" and the number

% For page numbers:
See page~\pageref{sec:methodology} for details.

% Convention: prefix labels by type
% sec: for sections, fig: for figures, tab: for tables, eq: for equations

Text Formatting and Environments

LaTeX provides commands for all standard text formatting. The key principle is that formatting commands describe semantic meaning rather than visual style—\emph{} means “emphasise this” rather than “make this italic,” and the class can define emphasis differently. This separation of meaning from appearance is what makes LaTeX documents consistent at scale.

Font and Text Commands

\textbf{Bold text}
\textit{Italic text}
\emph{Emphasised text}           % Italic in normal context, upright in italic context
\underline{Underlined text}
\texttt{Monospace / typewriter text}
\textsc{Small Caps}
\textsuperscript{superscript}   % Like footnote marks: text^{like this}
\textsubscript{subscript}

% Font sizes (relative to base size)
{\tiny smallest}  {\footnotesize smaller}  {\small small}
{\normalsize normal}  {\large large}  {\Large larger}  {\huge huge}

Paragraphs, Spacing, and Line Breaks

In LaTeX, a blank line between text creates a new paragraph. A single line break in the source has no effect on output—LaTeX reflowes text automatically. This is a common surprise for new users who expect their source line breaks to appear in the PDF.

First paragraph text here.

Second paragraph starts here
after the blank line.

\\          % Force line break
\newline    % Same as \\
\newpage    % Start new page
\clearpage  % New page, flush floats
\noindent   % No indent on next paragraph

Packages That Extend Formatting

LaTeX packages extend the base system’s capabilities. Packages are loaded in the preamble with \usepackage{}. Overleaf has TeX Live installed, which includes virtually every package on CTAN (the Comprehensive TeX Archive Network), so you never need to install packages manually.

Mathematical Equations in Overleaf

Mathematical typesetting is where LaTeX—and by extension Overleaf—outperforms every other writing tool available. The quality of LaTeX’s math rendering is the primary reason scientific journals in physics, mathematics, statistics, and engineering require LaTeX source rather than Word documents. The amsmath package, produced by the American Mathematical Society, provides the environments most academic writers need.

Inline vs Display Math

% Inline math — appears within the text flow
The area of a circle is $A = \pi r^2$, where $r$ is the radius.

% Display math — centred on its own line, no number
\[
    E = mc^2
\]

% Numbered equation — use equation environment
\begin{equation}
    F = ma
    \label{eq:newton}
\end{equation}

As shown in Equation~\eqref{eq:newton}, force equals mass times acceleration.

Common Mathematical Constructs

% Fractions
\frac{numerator}{denominator}
\dfrac{n}{d}              % Display-style fraction in inline mode

% Superscripts and subscripts
x^{2}               % Superscript: x²
x_{i}               % Subscript: x with index i
x^{2}_{i}           % Both: x² with subscript i

% Greek letters
\alpha  \beta  \gamma  \delta  \epsilon  \theta
\lambda \mu    \pi     \sigma  \phi      \omega

% Sums, integrals, products
\sum_{i=1}^{n} x_i
\int_{0}^{\infty} f(x) \,dx
\prod_{k=1}^{n} a_k

% Square root and nth root
\sqrt{x+y}
\sqrt[3]{x}             % Cube root

% Matrices
\begin{pmatrix}         % Parenthesis brackets
  a & b \\
  c & d
\end{pmatrix}

Multi-Line Equations with alignment

\begin{align}
    y &= x^2 + 3x + 2  \label{eq:first} \\
      &= (x+1)(x+2)    \label{eq:factored}
\end{align}

% align* suppresses equation numbers
\begin{align*}
    f(x) &= \int_0^x g(t)\,dt \\
    f'(x) &= g(x)
\end{align*}

% The & symbol marks the alignment point — all = signs align vertically

Including Figures and Images

The graphicx package handles image inclusion in LaTeX. Overleaf supports PDF, PNG, JPG, and EPS formats. PDF images generally produce the best quality in compiled documents because they scale without pixelation. For plots and graphs, export from MATLAB, Python (matplotlib), or R as PDF or high-resolution PNG before uploading to Overleaf.

Uploading Images to Overleaf

1. Click the upload button in the file tree panel (left sidebar). It appears as an up-arrow icon above the file list.
2. Choose your image file from your computer. Overleaf accepts .pdf, .png, .jpg, .eps. Drag and drop also works directly onto the file tree.
3. Organise into a folder (optional but recommended). Right-click in the file tree and select “New Folder” — name it figures or images. Keeping images separate from .tex files makes large projects manageable.
4. Reference the file path in your \includegraphics command. If in a folder: \includegraphics{figures/myplot.pdf}.

The Figure Environment

\begin{figure}[htbp]   % Placement: here, top, bottom, page
    \centering
    \includegraphics[width=0.8\textwidth]{figures/results.pdf}
    \caption{Results showing the relationship between X and Y variables.
             Error bars represent standard deviation (n=45).}
    \label{fig:results}
\end{figure}

% Reference in text:
As shown in Figure~\ref{fig:results}, the correlation is strong.

Figure Placement and Floats

LaTeX places figures and tables automatically as “floats”—it finds the best available position that does not interrupt text flow. The placement specifier in square brackets is a preference, not an absolute instruction. The options are h (here, where the command appears), t (top of page), b (bottom of page), p (separate page for floats only), and ! (override LaTeX’s float restrictions). [htbp] is the most permissive combination and usually produces good placement.

Side-by-Side Figures with subfigure

\usepackage{subcaption}  % In preamble

\begin{figure}[htbp]
    \centering
    \begin{subfigure}[b]{0.48\textwidth}
        \centering
        \includegraphics[width=\textwidth]{figures/fig1.pdf}
        \caption{First subfigure}
        \label{fig:a}
    \end{subfigure}
    \hfill
    \begin{subfigure}[b]{0.48\textwidth}
        \centering
        \includegraphics[width=\textwidth]{figures/fig2.pdf}
        \caption{Second subfigure}
        \label{fig:b}
    \end{subfigure}
    \caption{Overall caption for both figures.}
    \label{fig:both}
\end{figure}

Creating Tables in LaTeX and Overleaf

Tables in LaTeX require more initial code than in Word but produce more consistent, professionally formatted results. The tabular environment handles the table content; the table float environment handles placement, caption, and label. The booktabs package provides horizontal rules that meet journal formatting standards—always load it.

Basic Table Structure

\usepackage{booktabs}   % In preamble

\begin{table}[htbp]
    \centering
    \caption{Descriptive Statistics by Group}  % Caption above table
    \label{tab:descriptive}
    \begin{tabular}{lrrrr}   % l=left, r=right, c=centre (one letter per column)
        \toprule
        Group & n & Mean & SD & Range \\
        \midrule
        Control   & 45 & 23.4 & 4.1 & 15--32 \\
        Treatment & 48 & 28.9 & 3.7 & 19--38 \\
        Combined  & 93 & 26.2 & 4.6 & 15--38 \\
        \bottomrule
    \end{tabular}
\end{table}

Multi-Page Tables with longtable

\usepackage{longtable}
\usepackage{booktabs}

\begin{longtable}{lrr}
    \caption{Full Dataset Results} \label{tab:full} \\
    \toprule
    ID & Score & Rank \\
    \midrule
    \endfirsthead     % Header for first page only
    \toprule
    ID & Score & Rank \\
    \midrule
    \endhead           % Header repeated on subsequent pages
    \bottomrule
    \endfoot           % Footer on every page except last
    \bottomrule
    \endlastfoot       % Footer on last page
    % Table content rows
    1 & 87.3 & 1 \\
    2 & 84.1 & 2 \\
\end{longtable}

Citations and Bibliography with BibTeX and BibLaTeX

Automated bibliography management is one of the most compelling reasons academics choose LaTeX over Word. You maintain a .bib file—a database of references in BibTeX format—and LaTeX generates your reference list automatically, formatted to your chosen citation style, numbered or author-year, in whatever order the style requires. Adding or removing a citation automatically updates the reference list without any manual intervention.

Creating a .bib File

In Overleaf’s file tree, click the new file button and name it references.bib. This file holds all your references in BibTeX format. Each entry has a type (@article, @book, @inproceedings), a unique citation key, and fields containing the reference’s metadata.

% Journal article
@article{smith2022cognitive,
    author  = {Smith, John A. and Jones, Mary B.},
    title   = {Cognitive Effects of Sleep Deprivation in University Students},
    journal = {Journal of Sleep Research},
    year    = {2022},
    volume  = {31},
    number  = {4},
    pages   = {e13540},
    doi     = {10.1111/jsr.13540}
}

% Book
@book{knuth1986tex,
    author    = {Knuth, Donald E.},
    title     = {The \TeX{}book},
    publisher = {Addison-Wesley},
    year      = {1986},
    address   = {Reading, MA}
}

% Conference paper
@inproceedings{lee2021attention,
    author    = {Lee, S. and Park, K.},
    title     = {Attention Mechanisms in Transformer Networks},
    booktitle = {Proceedings of the 38th International Conference on Machine Learning},
    year      = {2021},
    pages     = {6234--6245}
}

Citing in the Document

% Method 1: Traditional BibTeX
\usepackage{natbib}           % Flexible citation commands

% In text:
Smith et al.~\citep{smith2022cognitive} found that...
\citet{smith2022cognitive} found that...    % Author (year) format
\citep{smith2022cognitive}               % (Author, year) format
\cite{smith2022cognitive}                % Author, year — no brackets

% At end of document (before \end{document}):
\bibliographystyle{apalike}           % Style: plain, apalike, ieeetr, etc.
\bibliography{references}             % Filename without .bib extension

BibLaTeX: The Modern Alternative

BibLaTeX with the Biber backend is the current standard for bibliography management in LaTeX, replacing traditional BibTeX for most use cases. It offers better Unicode support, more flexible citation styles, and easier customisation. Many new journal templates use BibLaTeX.

% In preamble:
\usepackage[style=apa, backend=biber]{biblatex}
\addbibresource{references.bib}

% In text:
\cite{smith2022cognitive}
\textcite{smith2022cognitive}   % Author (year) inline
\parencite{smith2022cognitive}  % (Author, year) parenthetical

% At end of document:
\printbibliography

% In Overleaf: Menu → Compiler → select "pdfLaTeX + Biber"

Importing References from Zotero and Mendeley

Overleaf Standard and Professional plans integrate directly with Zotero and Mendeley. Link your account in Overleaf settings, and your Zotero or Mendeley library appears in the Overleaf file tree as a .bib file that syncs automatically. When you add a new reference in Zotero, reopen the Overleaf file tree and the .bib file updates. This workflow eliminates manual BibTeX entry, which is error-prone and time-consuming for large bibliographies. For research writing support that includes citation management, our research paper writing services handle the complete reference workflow.

Collaboration Features in Overleaf

Sharing a Project

1. Click the Share button in the top-right of any open project. The share panel opens.
2. Enter collaborators’ email addresses. Choose their access level: Can Edit (full editing rights) or Can View (read-only access). Click the Share button to send the invitation.
3. Alternatively, generate a link. “Anyone with this link can edit” or “Anyone with this link can view.” Useful for reviewers who may not have Overleaf accounts—they can create a free account via the link.
4. The editor colours next to each collaborator’s name indicate who is actively editing. Click a collaborator’s avatar to jump to their cursor position in the source.

Track Changes (Paid Plans)

Track Changes in Overleaf works similarly to Word’s revision tracking. Enable it from the Review menu in the editor toolbar. When active, all edits appear highlighted: additions in green, deletions in red with strikethrough. Each change is attributed to the author who made it. The document owner or any editor with Track Changes permissions can accept or reject individual changes. This feature is essential for co-authoring with supervisors, co-investigators, or journal reviewers who want to see exactly what changed between versions.

Comments and Review

In Track Changes mode, select any text and click “Add Comment” to leave an inline comment visible to all collaborators. Comments appear in the margin panel on the right side of the editor. This creates a structured review workflow: one author writes, another comments, the first author responds and resolves. All comments are timestamped and attributed, creating a record of editorial decisions throughout the writing process.

Project History

Overleaf maintains a full history of every compilation and edit. Access it via History in the toolbar. The free plan shows 24 hours of history; paid plans show full project history from creation. Each history entry shows a diff view—highlighted additions and deletions—so you can see exactly what changed between any two points. You can restore any previous version with one click. This effectively functions as built-in version control, though it is not as granular as Git.

Git and GitHub Sync (Paid Plans)

$ git clone https://git.overleaf.com/your-project-id

# Work locally, then push back to Overleaf
$ git add .
$ git commit -m "Add methodology section"
$ git push origin master

# Pull changes made in Overleaf by collaborators
$ git pull origin master

Git integration lets you work in your preferred local editor (VS Code, Emacs, Vim) and sync changes bidirectionally with Overleaf. This is particularly useful for researchers who are comfortable with command-line Git and want the version control granularity of Git commits alongside Overleaf’s collaborative compilation. The GitHub sync feature (also paid) connects Overleaf directly to a GitHub repository—useful for open-source papers or when your institution’s data policies require code and paper to be version-controlled together.

Templates and Journal Submission Workflows

One of Overleaf’s most practically valuable features is its template gallery. Rather than building a journal-compliant document from scratch, you load the journal’s official template—which sets the document class, packages, page layout, font, column structure, and citation style automatically—and fill in your content. This saves hours of formatting work and ensures your submission meets the journal’s exact requirements.

Finding and Using Templates

1. From the Overleaf dashboard, click New Project → View All Templates. The template gallery opens with search and filter options.
2. Search by journal name, conference, institution, or document type. Templates are tagged by publisher (Elsevier, Springer, IEEE, ACM, APS, Nature, etc.) and by type (journal article, conference paper, dissertation, CV, presentation).
3. Click a template to see a preview. If it matches your target, click Open as Template. Overleaf creates a new project from the template with all files pre-configured.
4. Replace the placeholder content with your own text, figures, and references. The structure—including required sections, formatting, and citation style—is already in place.

Major Publisher Templates Available in Overleaf

Submitting to Journals from Overleaf

Overleaf has direct submission integration with a growing list of journals. When your paper is ready, click Submit in the editor toolbar. If your target journal appears in the submission integration list, Overleaf packages your .tex files, figures, and .bib file and transfers them directly to the journal’s submission system. For journals without direct integration, use Overleaf’s Download Source function to export a ZIP archive of all project files, then upload that ZIP to the journal’s submission portal.

Keyboard Shortcuts and Productivity Features

Overleaf’s keyboard shortcuts significantly reduce the friction of LaTeX editing. Most shortcuts are consistent with standard text editor conventions, with additional LaTeX-specific shortcuts for compiling, wrapping text in commands, and navigating the editor.

Essential Keyboard Shortcuts

Rich Text Mode vs Source Mode

Overleaf offers two editing modes accessible from the toolbar: Source (standard LaTeX code) and Rich Text (a simplified visual editor). Rich Text mode hides the LaTeX commands and shows formatted text directly, similar to a word processor. Headings look like headings; bold appears bold; equations render inline. For users new to LaTeX who want to learn the syntax gradually, Rich Text mode reduces the initial intimidation while the underlying LaTeX source remains intact and compilable.

The transition from Rich Text to Source mode is straightforward—switch at any time using the toggle in the toolbar. Most experienced LaTeX users work exclusively in Source mode because Rich Text’s visual abstraction can occasionally produce unexpected source code that is harder to debug.

Troubleshooting Compilation Errors

Every LaTeX user encounters compilation errors. The Overleaf logs panel provides the same output as a local LaTeX installation, which can be verbose and initially intimidating. Understanding how to read error messages efficiently—finding the relevant line and understanding what it reports—makes debugging fast rather than frustrating.

Reading the Error Log

! LaTeX Error: File `natbib.sty' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: sty)

Enter file name:
! Emergency stop.
l.3 \usepackage
               {natbib}

!  ==> Fatal error occurred, no output PDF file produced!

This error tells you: the file natbib.sty was not found. The line l.3 means line 3 of the source file. The fix: the package name may be misspelled, or (in a local installation) the package is not installed. In Overleaf, this virtually never happens because TeX Live is fully installed—the more likely cause is a typo: \usepackage{natbib} written as \usepackage{nattbib}.

Most Common Errors and Fixes

Advanced Overleaf Features

Beyond the core writing workflow, Overleaf provides several advanced features that experienced users leverage to manage complex documents, automate formatting, and integrate with external tools.

Custom Commands and Macros

One of LaTeX’s most powerful features is the ability to define your own commands. If you find yourself typing the same sequence repeatedly—a specific equation, a styled text format, or a compound command—define it once in the preamble and use the shorthand throughout.

% In preamble — define a command for a frequently used notation
\newcommand{\vect}[1]{\mathbf{#1}}   % \vect{v} outputs bold v
\newcommand{\R}{\mathbb{R}}           % \R outputs ℝ (real numbers)
\newcommand{\doi}[1]{%
    \href{https://doi.org/#1}{doi:#1}   % \doi{10.1000/xyz} makes a hyperlink
}

% Redefining existing commands
\renewcommand{\abstractname}{Summary}  % Changes "Abstract" heading to "Summary"

Multi-File Projects with \input and \include

Long documents—dissertations, books—benefit from being split across multiple .tex files. The main file (e.g., main.tex) contains the preamble and structure; chapters or sections are in separate files included with \input or \include.

% main.tex
\documentclass{report}
% ... preamble ...
\begin{document}
\maketitle
\tableofcontents

\include{chapters/introduction}    % Starts on new page, adds to TOC
\include{chapters/literature}
\include{chapters/methodology}
\input{chapters/appendix_a}      % Continues on same page

\bibliography{references}
\end{document}

% \include: starts new page, usable with \includeonly for selective compilation
% \input: pastes file content inline, no page break

Selective Compilation with \includeonly

For large documents, compiling all chapters every time takes longer than necessary. The \includeonly command in the preamble tells LaTeX to compile only specified chapters, while maintaining correct numbering for the whole document:

% Only compile chapter 3 and 4 — numbering still reflects whole document
\includeonly{chapters/methodology, chapters/results}

Theorem Environments for Mathematics

\usepackage{amsthm}

% Define theorem-like environments in preamble
\newtheorem{theorem}{Theorem}[section]
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\theoremstyle{definition}
\newtheorem{definition}[theorem]{Definition}

% In document:
\begin{theorem}
    For all real numbers $a$ and $b$, $(a+b)^2 = a^2 + 2ab + b^2$.
\end{theorem}

\begin{proof}
    Expanding directly: $(a+b)^2 = (a+b)(a+b) = a^2+ab+ba+b^2 = a^2+2ab+b^2$. \qed
\end{proof}

Overleaf’s Built-In Spell Check and Grammar

Overleaf includes spell checking for over 70 languages. Activate it from the Menu → Spell Check → select your language. Misspelled words appear with a red underline. Right-click for suggestions. The spell checker is context-aware in the sense that it ignores LaTeX commands (which start with backslash), so command names do not trigger false positives. For academic writing, the spell check catches typos but does not perform grammar checking—proofread your content separately or use external tools before final submission. Our proofreading and editing services provide human review of documents produced in Overleaf, catching errors that automated checkers miss.

Overleaf AI Features

Overleaf has introduced AI-assisted writing features in its editor (available to certain plan levels). These include inline writing suggestions, reformulation assistance, and grammar improvements. While helpful for prose sections, AI assistance in LaTeX documents must be used carefully—AI tools are not trained on LaTeX syntax and can introduce structural errors into source code. Use AI assistance for the text content of paragraphs, not for LaTeX command structures or equations.

FAQs

From Your First Document to Publication-Ready Papers

The journey from “What is Overleaf?” to submitting a polished manuscript to a top journal is measured in weeks of practice, not years of expertise. The core workflow—write LaTeX source in the editor, compile to PDF, review output, adjust, recompile—becomes natural quickly. The harder part is learning the breadth of LaTeX’s capabilities: the equation environments for complex mathematics, the figure positioning system for multi-panel figures, the BibTeX workflow for large bibliographies, the custom commands that make long documents manageable.

The most effective learning strategy is working with real documents rather than tutorials in isolation. Start with a journal article you are actually writing—load the target journal’s Overleaf template, replace the placeholder content with your own, and encounter the specific challenges your document presents. Each error you fix and each formatting problem you solve builds the mental model that makes future documents faster and easier.

Overleaf’s template gallery, documentation, and the broader LaTeX community on TeX Stack Exchange together constitute an exceptionally comprehensive support ecosystem. Most questions have been asked and answered—often multiple times, with solutions for different contexts. The Overleaf Learn documentation covers virtually every aspect of LaTeX and Overleaf-specific features in clear, example-rich tutorials maintained by the Overleaf team. This combination of platform, community, and documentation makes LaTeX more accessible than it has ever been.

For students producing dissertations, researchers writing journal papers, and academics managing complex multi-author documents, Overleaf’s combination of collaborative editing, cloud compilation, template access, and journal submission integration makes it the most complete academic writing platform available. The learning investment—genuinely non-trivial for writers accustomed to word processors—pays dividends in document quality, consistency, and the professional credibility that comes with publication-ready typesetting.