How do I restore the display settings on my MacBook's built-in screen?

[zhouminjs]

Hello, author

My MacBook Pro is the 2020 model m1.
The system is Mac OS Sequoia 15.2 Beta.

Today, when I used an old version of betterDisplay to set up my external 1080p display, I saw an option to switch the refresh rate. I selected 70Hz, which the external screen itself should not support. After selecting it, the screen displayed abnormally. Not only the external screen was abnormal, but the key was that there was a problem with the display resolution of my laptop screen, which became very blurry. Switching the resolution in the mac settings was useless. It was always blurry, probably because hiDpi was not turned on. betterDisplay could not be opened either, so I reinstalled the latest version. There is a high-resolution HiDpi in it, and the screen becomes clear when it is turned on, but the resolution in the mac settings can only be 1680 x 1050. If you choose higher, it will be blurry. So how can I restore the HiDIP of my built-in screen?

Thank you🙏

[waydabber]

You can follow this to reset everything to its default settings: https://github.com/waydabber/BetterDisplay/wiki/Safe-mode,-app-reset,-app-removal#exhaustive-reset