Windows 8/8.1/10 How to run the game on a discrete graphics card?

My game always runs on the core graphics card, once I open multiple clients, it will not run smoothly.My computer's CPU is i7-10710U, the discrete graphics card is MX250, and the computer system is win10 1903 version. Please help me I ’m dying without maplelegends.

 

I right-clicked and selected run with High-performance NVIDIA processor, and then the screen flickered and nothing happened.

 

I disabled the core graphics card in the device manager, and then I could n’t even open the game. The program crashed with Failed in finding proper screen mode for Gr2D.

 

I solved the problem, I returned this computer.

 

Does anyone use Lenovo Legion y540 laptop to play this game?
I plan to go to an offline store tomorrow to test whether this laptop can play maplelegends with a discrete graphics card.

 

lenovo legion series laptops can play maplelegends with discrete graphics card, except for 1050 version.