You can change the runtime environment of an MVS™ subproject after it has been created.
When you create an MVS subproject,
you can choose a runtime environment for the subproject. The runtime
environment is used to associate runtime-specific actions with projects
and subprojects. You can see the runtime environment associated with
a subproject by selecting the subproject and opening the
Properties view.
To
change the runtime environment associated with a subproject: