All checkout steps on one page
I am missing either something very obvious or doing something very stupid. I have the whole store set up and everything is working as designed with exception of failing at providing a single page checkout. The checkout works fine in the three steps, but the requirement is that the coupons, cart quantity adjustments and payment is all done on one page. After the submit button is clicked, all I need is to show "Thank you".
I tried moving the checkout panes around but did not succeed in making this happen. Any nudges in right direction are highly appreciated.