-Dx9 or whatever it's called?

Hi, I have a problem on a band of servers, and I want to know the what the command is that you put in the launch options. I want to see if that fixes the glitch. Also, is there any way to tell what level it is at? I never changed it so I think it’s DX9.

In the launch options put -dxlevel 90

Alright. Thank you. But I want to go back to see if it will fix.