On the CHECKOUT page simply click the "Send as an eGift Now" button on the lower right. This will allow you to designate a recipient for the gift and when they will be notified of the gift via email. Then they simply open the email and preview their gift.
Remember, be sure to enter the correct SHIPPING ADDRESS for your recipient when you checkout. For gift subscriptions, the recipient will be emailed a unique code for them to use when activating their Chronicle subscription.