A line can be used to enhance the look of a process and to create separation from other fields or create sections in your Process. 



The Group drop down allows you to choose a field group that can help control whether or not to show/hide this field. (For more information on Field Groups, see: Field Groups). 


The Security settings will allow you to set permissions for this field. Staff users will always have Read permission for fields. Agency and Customer users can be set to have Read access or have the field Hidden from them.



In the example screenshot below, the line can be used to create separation between the Location Information section and the Critical Dates section.