You can fine-tune cropping if you've enabled SmugMug's proof-delay feature.
When a customer orders, we'll email you to let you know. You can check the order by going to Selling Tools in the global navigation bar, then selecting Sales History > Manage. The most recent order will appear at the top of the list. Click on Order Details to verify that the crops are good.
Once you've checked everything, or adjusted the crop as needed, click Release Order to send your customer's order to print.