Some problem with Unity

Hi everybody,
so I’m here because I’m creating a game and I’ve got some problem with my Unity engine.
So, first, I’ve a laptop (An MSI) which has two GPU : One Intel Graphics 4600 and one Nvidia GTX780M.
And my problem is that Unity doesn’t pick up the Nvidia GPU but the Intel GPU.
When I do :

Debug.Log(SystemInfo.graphicsDeviceName);

I’ve got this response

So my first question is : Can I change the default GPU in unity or on my Nvidia panel ?

And my second question is closely linked to my first :
I would like to enable DX11 on my Unity project, but I’ve got a problem again.
Indeed, when DX11 is activated, my game doesn’t render any shadow (Without DX11, it draws shadow), so I thought that as my Unity Engine doesn’t choose the Nvidia GPU but the Intel GPU (Which doesn’t support DX11), so it causes some problems.

I hope that you’ll find my problem and resolve it because this is really troublesome.

Cordially.

NVIDIA Control Panel > 3D Settings > Manage 3D Settings > Preferred Graphics Processor

Thank you for your answer (:
But I already did that and it still doesn’t work…
If somebody else has a suggestion…

Try to change it in the gobal settings as xtremepman said and make sure you save the settings and restart unity afterwards. At least that does work for me, if i do not restart Unity, it won’t show the new configuration.

Yes, that’s what I exactly did but it doesn’t work…