You have created Views and windows in the Execution Modeler.
For more information, see Defining the UI Layout .
You need to model a Popup window to enable a View to provide additional information through a secondary window within an application at runtime.
While performing a business transaction, the application user might need to assign a specific buyer to the transaction. In this case, the application user may want to verify the payment history along with other details of the buyer. Consequently, the Popup window for this situation allows the application user to view the buyer's payment history details in a secondary window.
While analyzing the expenses of various business units of an organization, the application user might want to view these expenses in a graphical manner. As in the situation above, the popup window allows the application user to view the expenses details in chart form.