Mobile Menu 12 and Horizontal menu

Hi,
You posted this on a thread for choosing how to have a different mobile menu:

My bad. Here's the example:

1. Go to WP Admin > Divi > DU - Header to edit your custom header style 10.
2. Then Load layout > Header Style 12 & uncheck 'Replace existing content'.
3. And remove the header style 12 top bar if you don't need it.
4. And for the header style 12 horizontal logo hamburger menu section, go to the Section settings > Advanced > Visibility & set it to be hidden in desktop.
5. And lastly, set this Theme Customizer > Divi Ultimate > Vertical Navigation > Always hide vertical navigation & show hamburger menu

Where does Step 2 come from? Is it in theme customiser? I can't see any place to uncheck 'Replace existing content'.

I would like to use header 5 and then run header 12 on mobile and tablet. Still struggling to make this work.

Thanks,

360