Layout Builder

Philosophy: Configuration-first approach. Layout Builder configuration lives in core.entity_view_display.*.yml with sections and components. Understand config schema, prioritize defaults over overrides, and use config management for deployment.

I Need To...

Task	Guide
Understand what Layout Builder does and when to use it	Overview
Enable LB on a content type or entity view mode	Enabling Layout Builder
Read and edit LB configuration YAML	Config Schema
Understand section structure and layout plugins	Sections & Layouts
Find available core layout plugins	Core Layout Plugins
Add blocks to layouts programmatically	Block Placement
Decide between inline and reusable blocks	Inline vs Reusable
Expose entity fields as blocks in layouts	Field & Extra Field Blocks
Choose between default layouts and per-entity overrides	Defaults vs Overrides
Restrict which blocks editors can add	Layout Builder Restrictions
Apply CSS classes to sections and blocks	Layout Builder Styles Overview
Create style groups and styles via YAML config	Style Groups Config
Define individual styles with restrictions	Style Definitions
Integrate LB Styles with Bootstrap/Radix	Bootstrap Integration
Extend LB Styles programmatically	Extending LB Styles
Use UI Patterns as LB layouts + UI Styles	UI Patterns Layouts & UI Styles Integration
Create custom layout plugins	Custom Layout Plugins
React to layout rendering with events	Events & Hooks
Export and deploy LB configuration	Config Export & Recipes
Style LB admin UI and frontend output	Theming Layout Builder
Follow configuration-first best practices	Best Practices
Avoid common mistakes	Anti-Patterns
Understand security and performance implications	Security & Performance
Find key classes and files	Code Reference Map
Check sources and version history	Sources & Maintenance