Advanced users could make edits to the HTML of every template on the store by going to Settings ->Design ->Template Editor to view all of the HTML templates contained in the store’s “Common” folder.
The Template Editor is still present in the New Admin but to get to it you will go to Settings ->Design ->Themes and Styles
Once there, you will see a button at the top right of the page labeled “Edit Template (HTML)”
Clicking on this button will display all of the HTML templates unique to your store. Along the top of this page, you will see a “Go to Folder” drop down menu. To specifically browse global templates used in the common folder, simply go to the common folder using this drop down.
As before, any common HTML templates edited via the template editor will be copied and placed in your store’s specific theme folder making your changes unique to your store’s design.