What feature allows you to manage complex logic in interfaces effectively in Appian?

Local Variables are essential in managing complex logic within Appian interfaces. They enable you to store and manipulate intermediate values within an interface without affecting the global context. By utilizing local variables, you can create dynamic display logic, store calculated values, or derive new values based on user input. This functionality allows for greater flexibility in managing the interface's behavior and presentation, adapting to user interactions and conditions effectively.

In contrast, constants serve to maintain fixed values that do not change, which is useful for standardizing data but do not provide the dynamic logic management offered by local variables. Conditional formatting focuses primarily on the visual aspects of the interface, such as changing colors or styles based on certain conditions. Process data, on the other hand, refers to information managed within the context of a process instance and is not suitable for the complexity of logic and interactivity needed within an interface.