There are two ways you can test your forrms.
Method 1: Click the 
save and test icon from within the forms designer to save the changes to your form and automatically display the test popup window. Complete the form in the popup window to test it. When your testing is completed and the test mode screen is closed you will be returned to page in the forms/flow designers where you clicked the save and test icon if you need to make additional changes.
Method 2: Click the 
save and exit icon on the Forms Designer toolbar to save the changes to your form and exit the form designer. Then click the 
Test icon for the form on the Forms Home Page to enter Test Mode. Complete the form in the popup window to test it.
Both methods display the test mode popup which includes the Test Mode Views discussed below.