Organization
Multi-Display (MD) content is organized as follows:
| Topic Area | Article | 
|---|---|
| Developing and testing | Recommended practices Testing and development environment Frequently asked questions | 
| Collections of related articles | Displays System decorations support Input method editor support | 
| Individual articles | Multi-resume Activity launch policy Lock screen Input routing Multi-zone audio | 
Terminology
Throughout these articles, primary and secondary displays are defined as follows:
- Primary (default) display has the display ID of
  DEFAULT_DISPLAY
- Secondary display has a display ID not
  DEFAULT_DISPLAY
