How to create and attach header
You can create headers with your own design easily with no coding knowledge. With Elementor Page Builder you can add rows and columns and customize everything with drag and drop editor and live preview. It is possible to set up your header with different structures and layouts for desktop, tablet, and mobile.
Go to WP admin sidebar and navigate to Templates > Add new. Select Header type of template, name your template (optional) and click on Create Template button.
Design your header with Elementor Page Builder. Add rows and columns and use all the available widgets to realize your idea. You can place navigation menu, insert logo, search form, display some contact information.
Attach Header in Customizer
In order to attach your template as general header go to WP admin panel and navigate to Appearance > Customize.
Navigate to Marmot -> Layouts and under Header Template select your template from the dropdown list.