Hi Peter,
On Windows, Visual COBOL includes two items to support browsing and editing data files. The first is caused Classic Data File Tools, and is in the Data Tools folder, under Visual COBOL on the Start Menu. In the same folder, there is also a Technology Preview of a new version of this tool, which is called just "Data File Tools".
Visual COBOL (for Eclpse) on Unix platforms offers the Technology Preview version of the Data File Tools mentioned above. You can access this by right clicking a data file in the COBOL Explorer, and choosing Open With- Data File Tools".