The Games Center includes a powerful Notion-like rules editor for creating and managing your game documentation:
Access rules by clicking the "Rules" tab within your game
Create new rules documents using one of two options:
Start from scratch with a blank document
Use Daniel Soles' comprehensive template designed for board game rulebooks
Use the rich text editor features:
Create headers and sub-headers to organize content
Add bulleted and numbered lists
Insert tables for component lists and game setup
Include images and diagrams
Create collapsible sections for organizing content
Use highlights and formatting for emphasis