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 several usability options for creating and managing elements and data in your workspace.