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Part 2: Understanding Code with Copilot Chat

📚 Lab Guide • ← Setup

Goal: Learn how to select a model and use Copilot Chat to explore codebases.

Steps

  1. Open the Landmarks project in Xcode
  2. Navigate to ContentView.swift Path: Landmarks/Views/ContentView.swift
  3. Open the Copilot Chat panel (see Setup step 6)
  4. Select a model: In the chat input area, look for the model selector (to the right of the wrench/settings icon), click it and choose the model you want. If GPT-5 mini is available, you can try that first.
    • Different models may provide different response styles and capabilities
    • You can experiment with different models to see which works best for you
  5. Select Ask mode using the mode toggle
  6. Try these prompts:
    • Explain what this file does
    • What SwiftUI components are used in this view?

Expected Result

Copilot provides clear explanations of the code structure and functionality.

💡 Tips

  • You can ask follow-up questions to dive deeper
  • Use @workspace to query across the entire project
  • Reference specific code by selecting it before asking
  • Try switching between different models to compare their responses

✅ Part 2 Complete!

You've learned how to:

  • Select and switch between AI models
  • Use Ask mode to explore codebases
  • Ask follow-up questions for deeper understanding
  • Use @workspace for project-wide queries