“Docking the peek” in Outlook
If you switch back and forth a lot between Outlook views, you can “dock the peek” at that view on the right side of your main screen in Outlook 2013.
Let’s say you dock the peek at your calendar by right-clicking the word Calendar at the bottom left of your Outlook window. Now, if you’re reading an email about an event on a future date, you can click that date on the peek view and it will list all your meetings and appointments for that day. You can also peek into any Outlook view from any other one!