How can switch my graphic card from Intel to GeForce 940mx

Hello, I have just created my acer account and i came here acer community because i had an encounter to an issue that i tried to solve it by myself but i couldn't it, so now that i found out about the Acer community website, i would like anyone to help me to fix an issued about graphic card.

So to start of, i tried to look for the geforce panel and i couldn't find and instead it was just intel's panel, and after that i opened the NVIDIA GeForce experience and this happened:

I clearly do have the graphics hard, and so for that i opened the device manager and when i opened it i saw this sign in the bottom of the graphics card:

then i clicked on it and it showed me this:

What should i do and how can could i fix this?