Viewing and changing packed data
When you want to view PDS or PDSE data set members that have been stored in ISPF PACK format, you
can tell File Manager to unpack the data before displaying
it. Once your data has been unpacked for display, you can view it as normal data. The records are
automatically packed again when you save the data set.
Note:
When PACK is disabled globally in ISPF, you cannot save data in packed format.
ISPF always saves the data in standard format.