Multi-tasking is now a lot easier with Outlook 2013. There’s no need to leave your email in order to check the calendar for appointments. And to make it even more interesting, you can also take a quick look at your Tasks and Contacts while editing the email.
In order to see your calendar, you simply move your cursor over the Calendar at the bottom and a smaller version of it will pop up next to your email. You can click through the various dates to see appointments just the same way as you can open a pop-up Tasks or People window by moving the cursor over these features.