This function lets you preview the widget function or the entire dashboard content in run-time. 

You should navigate to the Administration—Dashboard Widgets page. 

The Dashboard Widgets UI is rendered as below. The widgets are grouped and listed as a table showing display name, description, and validation status columns. Use the Search box to filter the list.  

Select the dashboard widget from the list and click the View - Preview menu option. 

The Widget UI Preview popup renders the widget functionality as below. Click the Close button to continue.