On the product info page (tpl_product_info_display), I am assuming that it is this code:
PHP Code:
<?php
      
echo $display_qty;
      echo 
$display_button;
            
?>
          </div>
that controls and places the 'Qty' box and the 'Add to Cart' button.

Currently, the 'Qty' box is on top of the Add to Cart button *How* do I put them on the same line together, with the Qty box coming first.