To reuse a minischema:
In Select Minischema, select Reuse an existing schema diagram.
From the drop-down list, select the schema diagram that you want to reuse.
Optional: To clear the contents of the diagram that you chose in step 3, select Clear existing schema.
Clicking Next takes you to the Populate Minischema page of the wizard, described in Populating a Minischema for Text File Sources.