In the Salesforce Lightning component, what is the difference between force:lightningQuickAction and force:lightningQuickActionWithoutHeader?

In the Salesforce Lightning component, what is the difference between

1.	In the Salesforce Lightning component, what is the difference between force:lightningQuickAction and force:lightningQuickActionWithoutHeader?
Answer» Interface FORCE:LIGHTNING - QuickAction ALLOWS you to use the component in Lightning Experience or the Salesforce mobile app as a custom action. Component interface shows in a panel with typical action controls, such as a Cancel button, when force:lightningQuickAction is used in a component. Interface force:lightningQuickActionWithoutHeader - The component can be used as a custom action in Lightning Experience or the Salesforce mobile app thanks to the force:lightningQuickActionWithoutHeader interface. When force:lightningQuickAction is used in a component, the component interface appears in a panel without any NORMAL action controls, such as a cancel button.