Here's a brief guide on how to use this functionality.
First make sure you are logged in to your account, then add the items you wish to order to your cart. If you're sending a single item to multiple people, you can just add one, otherwise, please add everything you plan to order before proceeding.
In your cart please select the checkbox for shipping to multiple addresses:
The cart will change to a view like this, and you will be able to select from addresses you have previously shipped to:
If you'd like to enter a new address you can do so from the drop down as well. This screen will pop up.
If you're sending the same item to multiple people please click the "+" sign to add one on another line so you can select that recipient.
Click continue, and you'll be able to select shipping options per recipient, and enter gift messages
A message box will pop up, please be sure to hit save after entering your message.
Then just enter any promo codes, if applicable, and proceed to checkout as usual.
You'll receive order confirmation emails for each of your recipients, and only have to checkout once!