By default zuvi theme will show a copyright text in footer. Format of this text is:
© YEAR SITE NAME, All rights reserved.
How to Show / Hide footer copyright text
Footer copyright can be managed from theme settings page.
Navigate to:
Home Administration Appearance Appearance settings Zuvi
example.com/admin/appearance/settings/zuvi
On this page, you can show / hide copyright text.
Custom Copyright Text
This feature is available in ZuviPro theme. You can read more about ZuviPro and purchase this theme from here:
ZuviPro Premium Drupal 8 Theme