Hi,
Well, I’m afraid there is no way to do that at the moment via settings. It might be doable though via custom code.
Try adding this custom code to the functions.php in your theme/child theme directory. Before editing, please make sure to have a full site back-up just in case!
add_filter('asp_results', 'asp_image_results_first', 10, 1);
function asp_image_results_first( $results ) {
$image_res = array();
$non_image_res = array();
foreach ( $results as $k => &$r ) {
if ( !empty($r->image) ) {
$image_res[] = $r;
} else {
$non_image_res[] = $r;
}
}
return $image_res + $non_image_res;
}