A:Answer In settings, you can select how this will function. You can have it detect a new input, or you can have it choose by which device is providing feed or video signal. Works the same as a normal TV with multiple HDMI ports. It will go to the device that is sending information.
Example:
PS4 and Nvidia Shield connected. To toggle, I press the PS4 button to switch to PS4, and when I want to switch to Nvidia Shield, press something on the shield remote, etc.
Under settings - Automatic control options - Check HDMI powers on, and Video signal detected.