What are the methods for creating reusable transforamtions

1.Design it in the transformation developer.

2.Promote a standard transformation from the mapping
designer. After yoU add a transformation to the mapping ,
yoU can promote it to the status of reusable transformation.
Once yoU promote a standard transformation to reusable
status, yoU can demote it to a standard transformation at
any time.

If you change the properties of a reusable transformation in
mapping, yoU can revert it to the original reusable
transformation properties by clicking the revert button.