You can copy segments across folders or projects. Consider the following rules and guidelines when copying segments:

The Developer tool reuses dependencies when possible. If it cannot reuse the dependencies, it copies dependencies.
If a mapping, mapplet, rule, or virtual stored procedure includes parameters and you copy a transformation that refers to the parameter, the transformation in the target object uses a default value for the parameter.
You cannot copy input transformations and output transformations.
After you paste a segment, you cannot undo previous actions.

You can also generate a mapplet from a segment in a mapping or mapplet. You might want to generate a mapplet when a mapping or mapplet contains a connected transformation flow that you want to reuse. For more information about generating mapplets, see Generating a Mapplet.