Once a form definition is built, it can be previewed to see what it looks like at runtime.  Use the menu item “UI->Preview” to preview the form. The Preview/Render feature now opens only one window instead of multiple windows. In v9.12 the form definition preview has been improved to fit the screen size.

The preview of the form definition is as follows:

The preview let’s you view the form using different devices, here’s what the ipad view looks like: