Table Selections
Select the table you want to add to the new information category. Use the Add and Remove buttons (or double-click the table name) to add and remove tables from the selected table list.
If there are no tables available in the table selections window, use the Catalog Manager to add tables.
Once you have selected all the desired tables, click Finish. The Category window appears, displaying the tables you have selected. If more than one table was selected, you may continue to create joins. If not, you may save the information category.