how to show UI in another camera for vive

The canvas is set in world space, I can see it in vive when the vive camera can see UI.
But now, I want the UI to be shown on top of everything, so I want to create a new camera and make it depth only and see UI only. I can see the UI in pc but can’t see it in vive.
Is there way to combine vive camera with normal camera? or is there another way to show my UI on top of everything in vive camera?
thank you

Try attaching a world space camera to your camera rig for the vive. You’ll need to play around with size and scale so it covers everything and looks OK and distance from the player but it should follow your head around effective cover everything.