I am using "Vivaldi Classic" mode that was chosen at the welcome screen. How do I switch to "Vivaldi Fully Loaded"?
I expect that I can switch between "Vivaldi Essential", "Vivaldi Classic", and "Vivaldi Fully Loaded" from the settings, but in the settings there is no option for "Vivaldi Classic", "Vivaldi Essential", or "Vivaldi Fully Loaded".
How do I switch between them?
Simply open a tab in Vivaldi and go to (paste into the URL field):
This will allow you to switch between the available options.
Click Finish when done.