Jeffery Hicks shows how you can modify your Windows Terminal profile using Powershell:
I recently updated my Windows 10 systems to the 1903 release. One of the reasons is that I wanted to try out the new Windows Terminal preview. You can find it in the Windows Store. This is bleeding edge stuff and far from complete but promises to a great addition. Now you will be able to have all your command terminals, in one tabbed application and easily be able to switch between them. As I said, this is far from being a finished and polished product. Right now, if you want to add a new profile, that is another terminal, you have to manually edit a json file. If you have VS Code installed, the file will open in that. Otherwise, I’m assuming you’ll get whatever application is associated with the .json extension.
Read on for a Powershell one-liner which lets you create a terminal profile.