New PowerApps designer: where is my Customize the System link?

With the classic UI to lookup all the components for the environment you had to go via Settings -> Customizations-> Customize the System.

You could see all the components under the Default solution.

In a new designer:

1. Navigate to https://web.powerapps.com, login using you Dynamics 365 credentials (you will need appropriate security access)
2. Locate the Solution list.
3. Type “Default” in the Search box on the right side.
4. Yep, it’s here.