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Chart Elements -> Data Labels-> More Options...

Exam 77-420 Microsoft Excel 2013
5. Create Charts and Objects 
5.2 Format a Chart: Apply Chart Layouts and Styles (Chart Elements) Data Label Options

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More Data Label Options

The Callout Label shows two sets of data: The Category Name and the Value. The Category Names are the departments in Column A. The Values are the salaries in Column B.

6. Try it: Format the Data Labels
Go to Chart Elements -> Data Labels.
Click on: More Options...
The Data Label options will open on the right.

What Do You See? The Label Options are:
Label Contains
Label Position

The options under Label Contains are:
Value From Cells
Series Name
Category Name
Value
Show Leader Lines
Legend key

A Separator keeps the data from running together. The Seperator can be a comma, semicolon, period, New Line or space.

Close the Format Data Labels options.
Keep going...

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