Using the Calendar's Reading Pane

Like the Inbox and other message views, the Calendar view also has a Reading Pane that lets you preview appointments and other items in your schedule without opening them.

To turn the Reading Pane on or off, do the following:

    1.    Open the Calendar folder and on the View tab, in the Layout group, choose the option you prefer from the Reading Pane list:

Layout group in Outlook 2016

    2.    To display more or less information in the pane, drag the edge of the Reading Pane to resize it. You can also make other changes to the displayed item - such as subject and times - through the Reading Pane.

Just click the item to have it appear in the Reading Pane:

Calendar's Reading Pane in Outlook 2016