Order forms are responsive, adapting to the screen size of your customers. If customers are viewing your form on a desktop screen, they can see products in rows. If they are using a tablet or a smart phone, they see products as cards. Resize your browser window to see the form change from rows to cards.
By default, the subtotal and buttons are at the bottom of the form. There are several layout options that put them on the left or right of the form, floating beside it or fixed in one place. Try the different layout pages to see what they look like.