# Key Features

## Content

Editor provides features for creating and editing <span data-highlighted="true" data-vc="highlighted-text">XHTML</span> documents.
**Built-in Ribbon**
Editor includes an integrated [ribbon](/componentone/api/win/online-editor-net/dotnet-api/C1.Win.Editor.10/C1.Win.Editor.Ribbon.html) that provides commonly used word-processing and document-formatting commands.
**Built-in Spell Checker**
The built-in **spell checker** detects spelling errors while text is entered and identifies them with a red wavy underline.
**Clipboard Support**
Editor supports standard **clipboard** operations for cutting, copying, and pasting selected text, tables, and graphics. Content from supported external sources can also be pasted into the document.
**Editor Modes**
Editor provides **Design** and **Preview** modes for editing and viewing documents.
For more information, see [Editor Mode.](/componentone/docs/win/online-editor-net/features/editormodes)
**Formatting Commands**
Editor provides commands for configuring fonts, text decorations, paragraph formatting, and block formatting without directly modifying the underlying `XmlDocument`.
**Load and Save Documents**
Editor supports loading and saving HTML documents.
**UI Automation Support**
The C1Editor toolbar integrates with C1Ribbon and supports UI automation for accessibility tools and automated UI testing.
**WYSIWYG Editor**
Editor displays and edits content as it appears in the final document. Preview mode displays the rendered document within the editing environment.