Allegedly, on or about 29 January 2018, Patrick O'Callaghan sent:
Looking for some advice here. I have a large set of old slides (transparencies) which I'm currently scanning for the family, but of course many of them are out of order.
I suppose it depends on how you're going to view them. If you're just going to use any photo viewer, you might have to start custom-naming the images.
If you're going to use a presentation viewer, as a slideshow, you could arrange the order in that.