Stuck in VR Mode... could use some help

I’ve been unable to get into my interface. It’s stuck in VR mode and expands off screen. I thought I could attach my Vive but all I get stuck in the Steam waiting room with a square box infront of me with three white flashing rectangles. Any idea how to get this unstuck?

Thanks,

Hap

Nevermind… a bit of fuddling seems to have helped.