How to Use Cursor AI: A Complete Beginner's Guide (2026)

What Is Cursor and Why Should You Care?

Cursor is an AI-powered code editor built as a fork of VS Code. It looks and feels like VS Code — same extensions, same keyboard shortcuts, same settings — but with AI capabilities deeply integrated into every part of the editing experience.

What makes Cursor different from just adding GitHub Copilot to VS Code:

• Composer mode: An agentic AI that can plan and execute multi-file changes
• Codebase indexing: The AI understands your entire project, not just the current file
• Multi-model support: Switch between GPT-4o, Claude, and other models
• Inline diffs: See exactly what the AI wants to change before accepting

Step 1: Install and Set Up

Download Cursor from cursor.com. It's available for macOS, Windows, and Linux.

First launch: 1. Cursor will offer to import your VS Code settings — accept this. Your extensions, themes, and keybindings transfer automatically. 2. Sign in with your account (free tier available) 3. Open a project folder

Important: Wait for codebase indexing to complete. You'll see a progress indicator in the status bar. For a typical project (10K-50K lines), this takes 1-3 minutes. For larger codebases, 5-15 minutes.

Step 2: Tab Completion (The Basics)

The simplest Cursor feature is Tab completion. As you type, Cursor predicts what you want to write next — not just the current line, but entire code blocks.

Try this: 1. Open a file and start typing a function signature 2. Cursor shows a ghost-text suggestion 3. Press Tab to accept, or keep typing to refine

Tab completions learn from your codebase. The more you code in a project, the better the suggestions match your patterns and naming conventions.

Pro tip: If the suggestion is partially right, press Ctrl+Right Arrow to accept word-by-word instead of the full suggestion.

Step 3: Inline Chat (Cmd+K)

Select any code and press Cmd+K (Mac) or Ctrl+K (Windows/Linux) to open inline chat. This lets you:

• "Add error handling to this function"
• "Convert this to TypeScript"
• "Optimize this query for performance"
• "Add JSDoc comments"

The AI generates changes as an inline diff — green for additions, red for deletions. Review the diff, then press Cmd+Enter to accept or Escape to cancel.

This is faster than copy-pasting code to ChatGPT because the AI already sees your file context.

Step 4: Chat Panel (Cmd+L)

Press Cmd+L to open the chat panel on the right side. This is for longer conversations about your code:

• "How does the authentication flow work in this project?"
• "What's the best way to add caching to this API endpoint?"
• "Explain this regex"

Using @ References

The chat panel supports @ references to pull in specific context:

• @filename.ts — reference a specific file
• @Codebase — search your entire indexed project
• @Docs — reference external documentation
• @Web — search the web for current information

Example: "@Codebase How does this project handle database migrations?" — Cursor searches your entire codebase and synthesizes an answer with file references.

Step 5: Composer Mode (The Power Feature)

Composer is what sets Cursor apart. Open it with Cmd+Shift+I.

Composer is an agentic AI that can: - Read multiple files across your project - Plan a sequence of changes - Edit multiple files in one operation - Run terminal commands - Iterate when something doesn't work

Your First Composer Task

Try something concrete:

> "Create a new API endpoint at /api/health that returns the server status, uptime, and current timestamp. Follow the same pattern as the existing endpoints in the routes directory."

Composer will: 1. Examine your existing route files to understand the pattern 2. Create a new file with the health endpoint 3. Update any route registry or index file 4. Show you all changes as diffs before applying

When to Use Composer vs Chat vs Inline

Step 6: Set Up .cursorrules

Create a .cursorrules file in your project root to give the AI persistent instructions:

` You are working on a Next.js 14 app with TypeScript. Use the App Router, not Pages Router. Prefer server components unless client interactivity is needed. Use Tailwind CSS for styling. Follow the existing naming conventions in the codebase. `

This file is automatically included in every Cursor AI interaction, ensuring consistent output that matches your project's conventions.

Pricing: Free vs Pro vs Business

The free tier is enough to evaluate Cursor. For daily professional use, Pro is essential — the 50 premium request limit on Free runs out in about 2 hours of active coding.

Compare Cursor vs GitHub Copilot | Compare Cursor vs Windsurf

Common Mistakes to Avoid

• Giving vague prompts in Composer. "Make this better" produces vague results. "Add input validation for email and phone fields, throw descriptive errors" produces precise code.
• Not setting up .cursorrules. Without project-specific instructions, the AI guesses at your conventions.
• Ignoring the diff preview. Always review changes before accepting, especially in Composer mode where multiple files change at once.
• Using Composer for simple edits. Inline edit (Cmd+K) is faster for single-file changes. Don't over-rely on Composer.

Next Steps

Once you're comfortable with the basics: - Explore model switching (Settings → Models) to find which AI model works best for your coding style - Try the @Docs feature to reference framework documentation directly in chat - Set up keyboard shortcuts for your most common Cursor actions

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Visit Cursor's tool page for our full review, or explore AI coding tools for alternatives.