The Change Data Source dialog box appears
when you choose the Set Datasource Location command from the
Crystal Reports menu, or from the context menu.
Use this dialog box to change the location
of the data source currently used in your report. Click OK to accept the new
data source and display the tables list.
You can choose to map fields to different
fields in the new data source. When you select a field, a list is displayed
that shows all the fields in the database that are the same type.