I wish there was a way to say, "I dont know any of the faces in this photo"... would be nice for group shots.

I"ve got a smart album that tells me a picture has unnamed faces.... and in big crowds there can be dozens of Xs to click. Multiplied by hundreds of pictures in a big library.

What I would like to do is somehow be able to change the default photo that is "on top" of the Faces stack. As I understand it it defaults to the first picture 'named" which is _often_ not the most ideal...

That was frustrating for me too, but it's actually pretty easy.

Mouse over the faces stack, you'll see they change. The oldest top left, newest bottom right.

Get "close" and them use the arrow keys to find "the right one".

Then hit SPACE to lock it in.