Extend an Existing App¶ You can extend a Lightning App by using community components or building your own. Add more Components Extend an App by adding a prebuilt component. basic Add a web user interface (UI) Extend an App by adding a web user interface (UI) basic Add a URL link Extend an App by adding a web URL link basic Build a Component Extend an App by building a Component basic Add a server Extend an App by adding a server to a Component. Intermediate