This function helps preview the dashboard widget's function. 

Go to the Administration > Dashboard Widgets menu. 

The Dashboard Widgets UI is displayed as shown below. The widgets are organised and listed in a table with columns for display name, description, and validation status. Use the Search box to filter the list.  

Select the dashboard widget from the list, then click the View > Preview menu option. 

The Widget UI Preview popup window appears, showcasing the widget's viewing function.