Following image highlights the main header area in MagazineBook WordPress theme:

In MagazineBook’s free version, currently we have two options for design of this main header area. You can choose one of them.
To change the Main Header design layout, follow these steps:
- Log in to your WordPress admin dashboard.
- Go to ‘Appearance > Customize‘.
- Go to ‘Header Options > Main Header Area Options‘.
- Select the header type from provided options & click ‘Publish‘ button.
Use following image for your reference:

If you select Type 2 header, you can add widgets on right side of your header. This can be a great place if you want to put an advertisement banner on your site.