The user interface for settings is an easy way to make these changes, but with ease of use comes ease of messing something up. If your settings go haywire after a change, you can always revert to the default settings. There are a variety of methods to do this. You could just find the file and delete its contents, for example. But the simplest method is to just delete the JSON file where the settings are saved. When you open Windows Terminal again after the following steps, the file will be restored, although this time with default settings.  

  1. In Windows Explorer, copy and paste the following path in the address bar:  %LocalAppData%\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState
  2. In the folder that opens, select settings.json.
  3. Click Delete on the menu bar to remove the file.