[![enter image description here](https://i.stack.imgur.com/zaXa3.png)](https://i.stack.imgur.com/zaXa3.png)
I have created a 2D project. The images I used for sprites are all with high resolution. However I do not know what settings I have changed today, the sprites in game window started look terrible when I tested the game(good quality in scene window). And this happens to all of the projects I created earlier. But when I build the exe file to play, the graphics look all good with original quality. Could anyone tell me how to fix this issue?