To access a File options, environment must be stopped then right-click on a File. Right-clicking on a File gives you access to 5 options
Hold/Release: Block/Release the selected rule
Insert: Allows you to insert a new Selection rule before or after or creates one if it does not exist yet
Delete: Deletes the selection rules
Generate: Generates the list of objects to be part of the perimeter
Settings: Allows you to modify the selection rule