How do I activate the Express mode within Visual Builder Studio?

Summary:

I have activated Visual Builder Studio, but cannot see Express/Advanced mode at the top of the screen.

Content (please ensure you mask any confidential information):

I have just started to use Visual Builder and so far have created a project.

How do I activate the Express mode and is there a specific screen I need to be in to activate this?

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):