In my opiniom it should be with narrative:
At the beginning of the major version like reduce 3 or reduce 4 - summary of whole story from beginning
At the beginning of minor part like reduce 3 part 2 - reminder only about previous part
So I totally agree with my brother @Mejson
Mejson
@Colizza, you like our Posters for a long time, well nobody will hurt you if you write something XD What do you think about Reduce Saga? :)