Overview
Themes provide a no-code alternative to Players for customizing Flows. You have the ability to customize the design elements contained within any flow such as fonts, background color, border and so on.
Adding customizations to a Flow formerly required modifying a Player and executing the Flow. Themes eliminates the need to manually edit HTML code by providing a user interface for the most common customizations.

Remember: Ensure that Themes toggle button is turned on in your Tenant page settings. As you switch on Themes, the Players menu will be disabled and the Themes menu will be enabled.