LibreOffice 7.1 How to return to the default User Interface?

I used ‘View’ to try out another User Interface. I now cannot find how return to the default UI.
I hope I don’t need to re-install. Many thanks for any advice.

This won’t help at all, since the UI setting is part of your LibreOffice user profile, which won’t be touched if you re-install LibreOffice. Try:
Restore-Default-UI-2021-08-24 00-57

Brilliant! I can’t tell you how much I appreciate the trouble you’ve gone to make the video answer. In the hours I’ve spent trying to find the answer, I didn’t notice the three lines.