App Library helps you easily manage applications through an editor window. You can change options such as title, icon or gradient keys. You can also add your own custom app. This library works similarly to the UI Manager, so any changes you make to the library affect all connected objects. To see the library, you can click on Tools > DreamOS > Select App Library.
You need to use ‘App Element‘ component to fetch a data from the library. This component is used in objects such as the header, taskbar button, desktop button, and so on. You can use it on any object.