You can find the Header option in the theme Customizer on Appearance → Customize → Header.
Header Builder is visual builder which helps you create a custom header for your website easily.

Header was is designed with 3 rows: Top, Main, Bottom. All rows and columns have same settings but different position options.
Customizing Your Header

Customize builder item
To open customize of builder item you can choice one of actions bellow:
- In Header Builder Editor area click to builder item.
- In preview area hover on item preview then click to item name.
- In the left panel of Customize page, click to Header -> {Builder Item Name} e.g. Search Icon

Remove an item
Just Clicking on “X” icon on the corner of item, your item will be removed.