Enfold Feature Image Upload Issue

I am having issues with the images being uploaded. I changed my functions.php so the stadnard image size for my blog would be 728×510.

The issue is when an image is larger, it cuts off the top portion to fit the size. How can i get the image to resize to fit, rather than cropping things out?

$avia_config[‘imgSize’][‘entry_with_sidebar’] = array(‘width’=>728, ‘height’=>510, array(top, center)); // big images for blog and page entries
$avia_config[‘imgSize’][‘entry_without_sidebar’]= array(‘width’=>728, ‘height’=>510, array(top, center)); // images for fullsize pages and fullsize slider