Add header Widget

Adding a new widget area will require making some code changes in a child theme, and takes some familiarity with PHP and WordPress file structure.

Making a child theme means your changes won’t be overwritten when you update the theme. If you’re new to child themes, you can explore these guides:

http://codex.ww.wp.xz.cn/Child_Themes
https://www.smashingmagazine.com/2016/01/create-customize-wordpress-child-theme/

Once your child theme is set up, you can follow these guides to add a new widget area:

http://codex.ww.wp.xz.cn/Widgetizing_Themes
http://www.dummies.com/how-to/content/how-to-register-new-widget-areas-to-your-wordpress.html