Multi-visit management

Is the multi-visit feature something that is displayed in MME as separate layers. Or do I have to process multiple maps (different times) with the same ground control data?  I can't seem to find any information regarding this feature on the site.  

Multi-visit management

Multiple georeferenced visits to the same mapping site can be combined and arranged with our drag-and-drop interface. You can build and quickly view a history for every point on the map.  This feature is especially useful for construction monitoring, agriculture, pipeline documentation and solar array inspection.