in VR mode,how to let PC show 1920*1080 single screen

I’ve tried the solution provided by @svv3dUDN
I’d like to add that you can also set it to:
‘HMD mirror mode 3’
and
‘HMD mirror mode 4’ This will give you the desired look (tested in 4.13.2)

In case you get a black screen, or you can’t see anymore, the console commands still work, so you can blind type to get into the desired mode