Switching between dual display card

Hi,

I have recently purchased Inspiron 3501 laptop with Graphics card Nvidia Mx330 2GB and I can see below  display adapters in device manager & both are showing as working properly. 

Intel Iris Xe Graphics
2047MB NVIDIA GeForce MX330

But I observed always Intel Iris Xe Graphics adapter is selecting while running any applications. Even I tried to with HD videos,  but it is still taking Intel display card & the video clarity is very poor. So I would like to know whether there is any option to switch the default display adapter from Intel to NVIDIA?

Regards,

Sabu Jose