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Themes & Template Hierarchy

45-60 minIntermediate

Magento uses a complex fallback system: Parent Theme > Child Theme.

Intermediate Recommended

Structure

Key locations.

1

Files

1

app/design/frontend/Vendor/Theme/

2

layout/*.xml: Structure (Move blocks, add containers)

3

templates/*.phtml: HTML content (Edit H1, P tags)

4

web/css/: Styles

2

Best Practice

1

Never edit core files in vendor/

2

Always extend via a child theme in app/design/

Verification Checklist

  • Enable Template Hints in Admin