



For more information and examples to use to create your own system themes, see our Developer Documentation.To set Twenty-One as your WHMCS installation's system theme in the Client Area, go to Configuration ( ) > System Settings > General Settings. If you use a custom system theme or order form template, you can incorporate these changes with the help of their migration guide.All of the WHMCS-provided order form templates work with Bootstrap 4 in the Twenty-One or Bootstrap 3 Six. Bootstrap 4 has many layout and class differences compared to Bootstrap 3, which is used in the previous Six system theme. You can easily make a custom system theme to update this, or you can place a custom.css file in the css directory, which, if present, will be loaded by the system theme template system.This system theme uses Bootstrap 4 for a responsive and refined design experience. Features: Color Scheme Changer, Custom Orderform, WHMCS 7.9.Twenty-One offers a neutral color palette in gray tones with muted accents.
