The Divi theme will display the following default copyright text for the Footer: Designed by Elegant Themes | Powered by WordPress.
You can use two different ways to change the default Footer copyright text.
Change the Footer Copyright text using Theme Customizer (easy)
Go to WordPress Dashboard → Divi → Theme Customizer
Go to Footer → Bottom Bar
In the Edit Footer Credits, add your own custom copyright text
Save the change by clicking on the Publish button.
Note: If you need to, you can also use HTML code, for example, to add custom links.
Example:
This is a custom footer <a href="https://elegantthemes.com">text</a>
The above example will change the default copyright text with the following text: This is a custom footer text, where the text will be a link to the Elegant Themes website.
Change the Footer Copyright text using Theme Builder (medium)
Go to WordPress Dashboard → Divi → Theme Builder
Click on Add Global Footer
Choose the Build Global Footer option
Click on the Plus Green icon
to add a new RowChoose a 1 Column
Insert the Text module
Add your custom copyright text
Edit the Section settings and in Content Tab → Background → Background Color set a dark background color
Go to Section's Design Tab → Spacing → Padding, and for the Top and Bottom padding, set 0px
Edit the Text module, and from Design Tab → Text → Text Text Color, choose a light color
Save the changes and exit the Visual Builder
Click again on the Save Changes button
Notes:
Check the Divi Theme Builder documentation pages to learn more about Divi Theme Builder.
The steps above show the basic process of creating a custom Global Footer layout.