Toggle Nvidia Surround on and off.

The default is Cntrl Alt S. But by default it is not operative. You have to go to the surround setup screen and at bottom left look for the Settings Options icon and check the box that makes Cntrl Alt S operative.

First time using surround you have to set it all up manually. After that Cntrol Alt S will turn surround on and off quickly (if you have left that box checked).

Quirk: On my system toggling surround off will turn off all monitors except one. But Windows Display settings (right click on desktop) will allow you to extend the display across the screens and that will turn on all the monitors with one click. And surround will be off and all monitors back on.

Cntrl Alt S will turn surround back on quickly when desired.