.uxmlassets), and StyleSheets (USS /
.ussfiles), that you use with Unity's UI Toolkit (formerly UIElements). After you set up the UI Builder package, you can open the UI Builder window from the menu (Window > UI Toolkit > UI Builder), or from the Project window (double-click a
Note: In Unity 2019.x, you open the UI Builder from the Window > UI > UI Builder menu.Note: UI Builder is the visual authoring tool for UI Toolkit. It does not include runtime support. To enable runtime support in Unity 2020.1 and later, install the UI Toolkit package. For details, see this post on the Unity Forum: https://forum.unity.com/threads/ui-toolkit-1-0-preview-available.927822/.