How to show(or hide) the UMG on the specific screen(viewport)?

Hi Everyone I’m having a problem with nDisplay I had set 2 viewport in config file, and I like to show the UMG on one viewport, But somehow, the UMG will show on every single viewport that I set in config file. So my question is How to show(or hiede) the UMG on the specific screen(viewport)?

https://www.youtube.com/watch?v=Xm2U…ature=youtu.be