Cursor Composer: Multi-File AI Editing with Natural Language

Cursor Composer is an AI-powered tool that enables editing multiple files simultaneously through natural language instructions. ## Opening Composer - **Cmd+I** (Mac) / **Ctrl+I** (Windows): Floating Composer window - **Cmd+Shift+I** / **Ctrl+Shift+I**: Full-screen mode with three panels ## Full-Screen Layout 1. **Progress Panel** (left): Navigate between modified files 2. **File Section** (center): View and edit code changes 3. **Chat Panel** (right): Add more prompts and instructions ## How It Works Describe a change in plain English and Composer modifies multiple files - functions, imports, tests - with diff preview. Every change appears as a diff where you can accept, reject, or edit before applying. ## Best Practices - Mention specific files with **@** references - Always check diffs before accepting - Break complex tasks into features (don't ask for entire app in one prompt) - Iterate in conversation to build features progressively - Use Composer for documentation generation by having it analyze your codebase ## Undo/Redo Undo with Ctrl+Z / Cmd+Z reverts the entire multi-file operation - every file returns to its pre-Composer state in one keystroke. ## Best Use Cases - Architecture planning before implementation - Batch refactoring across multiple files - Generating READMEs and documentation - Multi-file feature implementation