The Column Definition workspace is the area which allows
you to define the options, properties and characteristics of the row data that
will appear in your report. You can customize your data and how it will appear
using the Column Fields, the Properties Pane
and the functions on the Columns Context
Ribbon.
The Column Definition workspace is designed to allow for easy creation and management of the columns that will appear on your report.
In addition, in the Column Definition workspace, you have a number of usability options for creating and managing elements and data in your workspace.