VR Preview issue in Windows screen

Hi there,

I am pretty new to UE4 and VR. I am just testing some VR projects. I wanted to show the VR Preview in the Windows, but I have here a quite different picture than in Glasses.

To see the whole scene I had to set vr.SpectatorScreenMode 2 (the other modes are too cropped). But this throws me black corners or black border to Windows VR Preview window.

Don´t you know how to set the VR Preview correctly to see the same scene in glasses and in Windows? I made some test with r.SetRes, but It did not helped me.

I am using HP Reverb and my screen is 1920x1080.

Thank you in advance for any idea.

V.