Switching between rift and monitor

As I have not implemented a rift project yet I know I'm asking a bit of a noob question.... but regardless

I poked around to see the guidance on stereo rendering, but am wondering if there is any standard method for switching between normal and stereo rendering yet.

So that when swapping from an extended mode dual screen, back to a single screen we can render normally... Or is there a way yet to toggle from direct to rift mode back to regular single rendered monitor screen.

?