To access the UMG Editor and make your user interface, you first need to create a
Widget Blueprint class. Right-click in the Content Browser, and under User Interface, select Widget Blueprint. Name it
Main_Menu, and double-click on it to open the UMG Editor.
The tab bar shows the currently open tabs. You can switch, close, rearrange, and move any tab from here.
The menu bar is where you can find the actions you would use: