On the Display tab, you specify which columns and calculated fields to expose through the Data Source and they appear. Typically, you select only columns that are useful in building or filtering reports, and omit other columns for simplicity. You also can modify display properties, such as the label and description of tables and sets and items for each specified column. Using meaningful labels and descriptions to help users of the Data Source.
The Display tab contains three panels:
Resources: View table lists or join trees, depending on the view you choose.
Join Trees: displays joined, unjoined, and calculated tables for the specified Data Source. Joined tables appear as join trees.
Table Lists: displays the selected and calculated tables for the specified Data Source.
Sets and Items: Lists resources that appear to report creators who use the Data Source.
Properties: Displays and modifies properties of selected sets and items.
In the Table List view, you can use the Delete Table button to remove the selected table from the Resources panel and from the Data Source design. The table no longer appears on the Joins tab, and any joins to the table are deleted.