UI libraries
UI libraries contain UI elements such as grids, buttons, sliders and so on that you can use and re-use in your UI pages.
Xenko projects include a standard library of UI elements. You can create your own libraries of custom elements too.
UI libraries are similar to in the Scene Editor; you can create your own elements, save them in a custom UI library, and then use them wherever you need across multiple UI pages. You can also nest libraries inside other libraries, just like nested prefabs.
In the Asset View, click Add asset > UI > UI library.
Game Studio adds the UI library to the Asset View.
Select the elements you want to create a UI library from.
Right-click and select Create library from selection.
Game Studio creates a library with a copy of the elements you selected.