Welcome to LayerLogic™, the ArcGIS® extension for real-time analysis using field formulas. This Help system will provide you with information you need to use LayerLogic. You can read it in sequence like a book, or skip straight to the section you need using the Index, Search, or context-sensitive links embedded in the LayerLogic interface. A “Quick Start” section at the beginning gives a condensed introduction to the entire LayerLogic application and provides several examples to work through.