Administrators will have access to switch it for any individual user through User settings > Edit preferences.
Toggle button present at the top of the screen will help user to switch between
Classic UI (Old UI) and Neo UI (New UI).
NPN
Unica Platform provides a common access point and user interface for Journey. The common
interface provides the following features.
When multiple Unica products are installed, you can navigate between products
without launching new windows.
You can view a listing of the pages that you have recently visited, and
navigate back to any of those pages using the Recent menu.
You can set a page as favorite by clicking on Favorites icon and page
will be listed in Favorites list.
You can access the search function for Folders, Journeys, Entry sources, Data
definitions, Template, All folders using the Search field. For example, if you
are viewing a list of entry sources within Journey, a search would take place
across entry sources.