To rename a member of a partitioned data set, select the UTILITIES option from the ISPF/PDF Primary Option Menu. Instead of selecting the DATASET option from the Utility Selection Menu, however, select the LIBRARY option (option 1).

--------------------------  UTILITY SELECTION MENU  ----------------------------
OPTION ===> 1

    1  LIBRARY     - Compress or print data set.  Print index listing.
                       Print, rename, delete, or browse members
    2  DATASET     - Allocate, rename, delete, catalog, uncatalog, or
                       display information of an entire data set
    3  MOVE/COPY   - Move, copy, or promote members or data sets
    4  DSLIST      - Print or display (to process) list of data set names
                       Print or display VTOC information
    5  RESET       - Reset statistics for members of ISPF library
    6  HARDCOPY    - Initiate hardcopy output
    8  OUTLIST     - Display, delete or print held job output
    9  COMMANDS    - Create/change an application command table
   10  CONVERT     - Convert old format messages/menu panels to new format
   11  FORMAT      - Format definition for formatted data Edit/Browse
   12  SUPERC      - Compare data sets (Standard dialog)
   13  SUPERCE     - Compare data sets (Extended dialog)
   14  SEARCH-FOR  - Search data sets for strings of data

You then see the Library Utility panel. To rename one member of a partitioned data set, specify the data set name including the member's current name in the ISPF LIBRARY fields. Specify the member's new name in the NEWNAME field, and type R on the OPTION line.

-------------------------------  LIBRARY UTILITY  ------------------------------
OPTION ===> R

    blank - Display member list               B - Browse member
    C - Compress data set                     P - Print member
    X - Print index listing                   R - Rename member
    L - Print entire data set                 D - Delete member
    I - Data set information                  S - Data set information (short)

ISPF LIBRARY:
    PROJECT ===>  prefix
    GROUP   ===>  memo      ===>             ===>            ===>
    TYPE    ===>  text
    MEMBER  ===>  aug01       (If option "P", "R", "D", or "B" selected)
    NEWNAME ===>  oct10       (If option "R" selected)


OTHER PARTITIONED OR SEQUENTIAL DATA SET:
    DATA SET NAME ===>
    VOLUME SERIAL ===>              (If not cataloged)

DATA SET PASSWORD ===>              (If password protected)