Creating format definitions and messages
You can create device format definitions and associated message definition files using the available wizards. The MFS Editor is typically accessed within the z/OS Projects perspective.
You can use the New MFS Device Format wizard to create format definition files within an existing local project, in a remote MVS subproject, or in an existing partitioned data set on a remote system. You can also use the MFS Editor to work with existing remote .mfs files.