How to adjust the screen ratio of Xiaomi Gaming Monitor G27i?

Xiaomi Gaming Monitor G27i can adjust the image aspect ratio by selecting it in the monitor menu;
1) No matter what resolution is output in full screen, the screen will be stretched to full screen 16:9 display;
2) 1:1 is completely based on the output resolution, displaying the picture according to physical pixels, without scaling, and the image will not be deformed;
3) Automatically stretch the image horizontally or vertically to the screen size according to the output resolution, and images with non-16:9 resolution will not be deformed;
Note: Adjusting the output resolution needs to be adjusted in the graphics card settings.