It is possible to operate the projects together in the COBOL solution project using the COBOL solution project context menu that is available from the "Dependency" view or "Structure" view. The context menu is displayed when the COBOL solution project is selected and then right-clicked.
For help on the COBOL solution project context menu, refer to "3.1.2.3 COBOL Solution Project" for the "Dependency" view, and refer to "3.2.2.3 COBOL solution project" for the "Structure" view.