I had a ton of random photos when I did the add people thing that were actually people it recognized in other photos but for whatever reason (sometimes obvious, sometimes not) it didn't pull in. So, I added them all in, combined the ones i knew immediately, then merged them into the correct people, then started going one by one.
But, I do also have some pictures I'd like to include. I need to find out what the actual rules are for this. Do they have to be in any certain folder, as I have a good number of photos from vacations in separate folders going back a ways that I'd like to add. Do I need to transfer them elsewhere?