Here’s an example of how Smart Resize works.
Original photo of two girls who just enjoyed eating a nice picnic lunch at the beach:

FotoFlexer Smart Resize is used to choose a photo element to preserve (in green) and another to eliminate (in red):

And the magic of FotoFlexer Smart Resize creates the new, desired image while maintaining the scale and composition of the entire photo:

There are many fun ways to apply this feature, imagine the possibilities. You can view a demo video discussing FotoFlexer Smart Resize here: http://fotoflexer.com/demos.php