What must be set to Yes for an element to be exposed and reused by modules of any application?

For an element to be exposed and reusable by modules of any application in OutSystems, it is essential to set the property to Public. This configuration allows the element to be accessible beyond the module in which it is defined, facilitating its use across different applications and promoting the principles of modularity and reusability in software design.

When an element is marked as a Public Property, it can be utilized in other modules, fostering a more efficient development process by enabling developers to share common functionalities without duplicating code. This practice not only saves time but also helps maintain consistency across modules, as updates to a public element will automatically reflect in all locations where it is used.

The other options—Private, Protected, and Visible—do not provide the same level of accessibility. A Private Property restricts visibility to the defining module, a Protected Property allows access within the same module or its descendants but not to all applications, and a Visible Property is not directly related to the element's usability across modules. Thus, marking an element as Public is the only way to achieve the desired outcome of broad reuse and accessibility across different applications.