What type of actions can users perform through interfaces in Appian?

Users can perform multiple actions through interfaces in Appian, including viewing, adding, and modifying data. This versatility is a critical feature of Appian's interface design, as it allows users to interact with applications in a dynamic way.

When users view data, they are accessing information stored in the system, which is crucial for understanding the current state of the application or the data being worked on. Adding data enables users to create new records, enhancing the application's data set. Additionally, modifying existing data allows for updates and corrections, which is essential for maintaining accurate and relevant information.

The ability to perform these three actions is fundamental to the functionality of interfaces, empowering users to engage more fully with the application and manage their tasks effectively. Thus, the correct answer reflects the comprehensive capabilities of interfaces in Appian, facilitating a more interactive and user-centered experience.