Your site is offline for maintenance.
Also this question is a bit unclear for us. Could you please clarify us with more details?
Please provide screenshot for our better understanding and highlight what exactly you want.
You have to edit the file header-structure-*.php file in the directory wp-content/themes/royal/headers (what file to edit depends on your header type you selected in Theme Options > Header).
We recommend to make changes in a child theme to avoid losing modifications after theme update.