On all the previews I saw for the update, it showed the lock screen slideshow having multiple pictures on the screen. Mine only does one picture at a time, and I don't see an option to change it. Does anyone know how to get that?
I have not got to that point yet in my testing. When I get there if I find the option I will post it. It's very possible this like the animated wallpaper may yet to be released for the public preview