Change button positions in page

When a client selects a product that they wish to purchase, and when they buy more than 1 unit of a specific product, they must click on the button 'update cart' in order for the system to keep that quantity. However, the button 'update cart' currently appears on the left hand side, making it difficult to understand that the client must actually click that button in order for the system to record any quantities higher than 1. I would like to move the buttons to the middle and have first 'Update cart', secondly 'continue shopping' and finally the option of 'checkout' Additionally I'd also like to add a like on top of the buttons reading 'CLICK ON UPDATE CART ONCE YOU HAVE ENTERED THE QUANTITY FOR YOUR PRODUCT' Thanks and I look forward to hearing from you. Ester