Actions can bring up Views. A modifier of the view show is the "Is Modal" modifier - that brings up the view in a modal overlay that must be closed by Ok or Cancel before continuing with other actions on the original page.

Yet another variation is the new "Is PopUp" modifier.

The PopUp is equal to the modal in many ways but differs from the Modal by:

• Not having the header
• Not having the ok and cancel buttons
• For allowing you to dismiss the PopUp by clicking outside the popup view

The PopUp is always submitting changes to the underlying view - and any cancel action you would like to perform must be done on the underlying (or starting) view.