Is there a way to have a collage of, say max 5 photos, but that it keeps rolling adding new photos in in continuous way so that any number of photos are actually presented using that collage effect over time.  Cyberlink PowerDirector has a number of examples - though it also has plenty of shortcomings, which is why I tried PhotoStory 2017.  Unfortunately, PS17 seems even more restricted in many ways - or maybe I have missed something?

Though the inability to re-centre each foto within a collage is a bit of a showstopper anyway.