Hello,
I'm not sure if its exactly what you're after but I use the Nvidia Control Panel if I want to specify which graphics is used for certain programs - integrated or Nvidia. For example, my Nvidia GPU only runs when I am:
- Video Editing in Vegas Movie Studio
- Recording Xbox gameplay via the Elgato game capture software
- On the very rare occasion that I play a game on my PC.
Pretty much all other times, my integrated graphics is being used. These settings can be changed in Nvidia Control Panel. May not be what you're after but thought I'd mention it.
Edit: I should also mention that Nvidia Control Panel also allows a 'Global' choice of GPU. For example, Choosing integrated GPU for everything and then manually choosing which programs use the Nvidia GPU. Nvidia Control Panel should already be installed on your machine.
Cheers.