Snippet for "back to cart" on the checkout page

You can use any filter in this file https://github.com/woothemes/woocommerce/blob/e39274e75391a186413da0bc5c217fa4c8bf2885/templates/checkout/payment.php#L50

Great.

Thank you very much!

Hi!

If you use breadcrumbs, a quick way to offer an option to return to cart from checkout is to edit the “checkout” page and select “cart” page as its parent. Breadcrumbs then shows home>cart>checkout.
I’ve also made “shop” page a parent of “cart” page, which gives a kind of “continue shopping” option with breadcrumb looking like this: home>shop>cart.

That’s my 2 cents…