[](https://github.com/stevencohn/OneMore/releases/latest) [](https://github.com/stevencohn/OneMore/releases/latest) [](https://onemoreaddin.com/get-started/How%20to%20Install%20OneNote.htm) [](https://github.com/stevencohn/OneMore/blob/main/LICENSE) [](https://onemoreaddin.com/developers/Setup.htm) 
# <img src="OneMore/Properties/Images/Logo48.png" alt="Description" width="36" height="36"> OneMore – a OneNote Add-in
OneMore is an add-in for OneNote with simple and powerful features that make OneNote a better OneNote.
* Download the [latest release](https://github.com/stevencohn/OneMore/releases/latest)
* Read the [installation instructions](https://onemoreaddin.com/get-started/How%20to%20Install%20OneMore.htm)
* See the [OneMore Guide](https://onemoreaddin.com/) for complete feature documentation and Command descriptions
## Everything OneNote should have shipped with
A few hundred small conveniences, all built into one add-in. Free, open source, and installs in under a minute.
### Key Features
- Use the **[Command Palette](https://onemoreaddin.com/the-basics/Command%20Palette.htm)** and **[Quick Palette](https://onemoreaddin.com/the-basics/Quick%20Palette.htm)** - 200+ commands and styles without leaving the keyboard
- Custom **[Text styles](https://onemoreaddin.com/commands/My%20Styles%20Commands.htm)** and **[Table themes](https://onemoreaddin.com/commands/Table%20Style%20Commands.htm)** provide consistent formatting across all notebooks
- Aut-generate **[Table of Contents](https://onemoreaddin.com/commands/Snippets%20Commands.htm#table-of-contents)** for any page, section, or notebook — kept in sync as you edit
- Paste **[Markdown](https://onemoreaddin.com/commands/Edit%20Commands.htm#markdown)** straight into OneNote, or drop in **[syntax-highlighted](https://onemoreaddin.com/commands/Colorize%20Command.htm)** code boxes for snippets
- Pin your most-used pages as **[Favorites](https://onemoreaddin.com/the-basics/Favorites.htm)** and tag notes with **[inline #hashtags](https://onemoreaddin.com/commands/Hashtag%20Commands.htm)** to find them instantly
- Crop, rotate, and **[Adjust images](https://onemoreaddin.com/commands/Image%20Commands.htm)** without leaving OneNote — plus render Mermaid and PlantUML diagrams
- Save any block of content as a reusable **[Snippet](https://onemoreaddin.com/commands/Snippets%20Commands.htm)**, then drop it into any page whenever you need it
- No subscription, no telemetry opt-in required, no catch. Built in the open on GitHub since 2018
### Popular with Users
Top commands from real usage across the OneMore community:
- **[Apply Style](https://onemoreaddin.com/commands/My%20Styles%20Commands.htm)** — 23,902 uses/month
- **[Paste Text](https://onemoreaddin.com/commands/Edit%20Commands.htm#paste-and-keep-text-only)** — 9,055 uses/month
- **[Insert TOC](https://onemoreaddin.com/commands/Snippets%20Commands.htm#table-of-contents)** — 8,543 uses/month
- **[Join Paragraph](https://onemoreaddin.com/commands/Edit%20Commands.htm#join-paragraph)** — 7,670 uses/month
- **[Insert Code Box](https://onemoreaddin.com/commands/Snippets%20Commands.htm#code-box)** — 5,197 uses/month
- **[Colorize](https://onemoreaddin.com/commands/Colorize%20Command.htm)** — 5,155 uses/month
See the full [OneMore User Guide](https://onemoreaddin.com/) for complete feature documentation and command descriptions.
### Get Started
- **[Installation Guide](https://onemoreaddin.com/get-started/index.html)** — Step-by-step setup instructions
- **[Feature Documentation](https://onemoreaddin.com/)** — Full user guide and command reference
- **[Command Line Interface](https://onemoreaddin.com/the-basics/OneMore%20CLI.htm)** — Automate 40+ commands from the command line
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# For Developers
OneMore is a comprehensive OneNote add-in built with C# and the OneNote Object Model. The project is organized into multiple components to support core functionality, testing, and deployment.
### Repository Structure
**Core Components**
- **OneMore/** — Primary add-in source code and ribbon UI
- **OneMoreCalendar/** — Specialized calendar application for tracking page creation/modification
- **OneMoreCli/** — Command-line interface runner for automating OneMore commands
- **OneMoreTray/** — System tray application component
- **OneMoreProtocolHandler/** — URI protocol handler for deep linking
**Setup & Installation**
- **OneMoreSetup/** — Installation package and setup wizard
- **OneMoreSetupActions/** — Custom setup actions and configuration
- **OneMoreBundle/** — Bundle packaging utilities
**Testing & Quality**
- **OneMoreTests/** — Unit and integration test suite
**Extensibility**
- **Plugins/** — Plugin architecture for extending OneMore functionality
- **Templates/** — Reusable content templates
- **Themes/** — UI theme definitions and customization
**Documentation & Resources**
- **docs/** — User documentation, guides, and website source
- **Reference/** — Reference materials and specifications
- **packers/** — Packaging and distribution utilities
### Build & Development
The project uses a Visual Studio solution structure (OneMore.sln) with PowerShell build scripts for compilation and deployment.
**Key Technologies**
- **Language:** C# (.NET Framework)
- **Platform:** Windows Desktop with OneNote Desktop integration
- **UI Framework:** OneNote Ribbon UI and WinForms/WPF components
- **Testing:** Unit tests in OneMoreTests
**Build Requirements**
- Visual Studio 2026 Community Edition
- .NET Framework 4.8.1
- OneNote Desktop Edition
See the [Developers Guide](https://onemoreaddin.com/developers/Setup.htm) for detailed setup instructions and contribution guidelines.
### Solution Architecture
The modular architecture allows OneMore to:
- Maintain a stable core add-in (OneMore/) while supporting specialized features
- Provide automation through the CLI runner without bloating the main add-in
- Enable plugin-based extensibility for advanced users
- Separate concerns between UI (Calendar, Tray), backend (Core), and tooling (CLI)
### License & Privacy
OneMore is released under the [Mozilla Public License 2.0](https://github.com/stevencohn/OneMore/blob/main/LICENSE). See the [Privacy Policy](https://onemoreaddin.com/get-started/Privacy%20Policy.htm) for information about how we handle user data — we don't collect personal information and remain committed to your privacy.
### Contributing
Contributions are welcome! Please see the [Developers Guide](https://onemoreaddin.com/developers/Setup.htm) for information on setting up a development environment and submitting pull requests.
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**© 2020 Steven M Cohn. All rights reserved.**