Reassigning Source Fields
You want to move source fields to a new position.
...
1.
From the list of
steps, choose Maintain source fields.
A screen appears.
2. Choose Change.
3. Position the cursor on the source field to be reassigned.
4. Select this source field.
5. Position the cursor on the source field under which you want to position the previously selected source field.
6.
Choose Source
fields ® Move field.
The field is reassigned.

Fields can only be moved within the corresponding structure.