This function lets you configure the dashboard's UI Theme on the designer canvas. 

Navigate to the Administration > Dashboard page. Select a dashboard from the list, then click Actions > Design. The dashboard content is rendered in the design view on the new page. Click Actions > Set UI Theme to initiate. 

Select between “Theme Colors " and " Custom Colors”. Configure the heading text, background color, body background, and text color to your preference. Click the Set UI button to confirm. A confirmation message appears in the top-right corner. 

Select the UI > Preview button to view the dashboard using the new UI theme.