This dialog allows you to change the properties of the selected MTBO Forbidden Route. 

MTBO Forbidden Route is used on

Mark one or more elements from the list of courses. When you mark "All courses", the MTBO Forbidden Route element will be shown on all courses, including those courses that are not marked in the list

Mark one or more elements from the list of canvases. When you mark "All canvases", the MTBO Forbidden Route element will be shown on all canvases, including those canvases that are not marked in the list.