# Key Features

## Content

Expression Editor offers numerous advanced features that help users create and edit complex expressions. Key capabilities include:
**IntelliSense**: Provides a Visual Studio–like experience with smart code completion, syntax highlighting, and instant error reporting to help users write accurate expressions quickly.
**Rich Expression Support**: Offers a wide range of built-in operators, constants, and functions for aggregate, logical, mathematical, text, date/time, and conversion operations. Supports multiple syntaxes and field aliases.
**Extensible**: Allows developers to add custom functions for evaluating additional logic.
**Customizable Appearance**: Supports styling and theming for the editor, suggestion pop-ups, error messages, and syntax elements.
**UI Automation**: Fully compatible with UI automation for accessibility and automated testing.