Is there a way to create environment editor UI for VR spectator?

I’m gonna start by saying I am pretty new to creating User Interfaces, but I am trying to create a User Interface for the VR Spectator that would allow them to edit the sun’s (directional light) location. I know there is a way that I could have the UI appear for the VR Pawn. However, I am trying to create the level for assessment purposes so I do not want the person who is in the HMD to see the interface. I just wanted to know if there was a way for this to happen because I don’t want to have to leave the simulation to move the light and then put the person back in. Any help or guidance is greatly appreciated because I haven’t been able to find any information on this.