Which statement is true regarding the Function property in Client Actions?

The statement that setting the Function property to No restricts the Action's use to the module where it is defined is indeed true. When an action is not designated as a function, it can only be accessed and used within the module in which it was created. This encapsulation is important for maintaining modularity and preventing unintended interactions between different modules.

Defining the Function property as No means that other modules will not be able to invoke that action, thus supporting better organization and reducing dependencies. It allows the developer to create reusable components that are not intended to be accessed globally, which is crucial for maintaining clean architecture within a larger application.

The other statements do not accurately reflect the functionality regarding the Function property in Client Actions. The ability to specify Output Parameters is independent of the Function property setting, and the restriction to Public Actions and usage in Screen Expressions does not apply in the manner described. The focus on modular use with the No setting thus highlights the importance of controlling access to actions within the development environment.