Polygons > Primitives > Create Plane creates a Plane object that fits the selected polygons.
Name - specifies the name of the newly created Plane object as it will appear in the Model Manager. The Name is automatically generated but can be overridden by the user.
OK button - stores the Plane object named Name in the Model Manager and closes the dialog.
Cancel button - terminates the dialog without saving a Cylinder object in the Model Manager.