With the default header, you cannot edit it. You can only tweak the settings which is provided in X > Theme Options > Header. Other than that, it will need custom modifications like recoding the structure of the default header which is why it is best that you use the custom header builder instead.
If you could provide me access to your site, I can create a sample custom header that will look like the header that you want to display. Would you mind providing us access to your site? Please create a secure note with the following info:
– Link to your site
– WordPress Admin username / password
To know how to create a secure note, please check this out: https://theme.co/apex/forum/t/how-to-get-support/288