What do you mean like a triangle forms? It the line starts at the top left and goes to the bottom right.

I have a 4k monitor. I have a 980m gfx card. Whenever i play, no matter the settings, I get a weird diagonal line that goes through the screen. its like clear but magnifies whatever it goes over or something, idk, its a minor distortion, but it only happens when i move, not anyone else. its from top ...