I have noticed several replies stating to use 'Initialize '.
One small gotcha I have found is that if your file layout is like:

   01  SOME-NAME.
       05  FIELD-1           Pic X(02).
       05  FILLER            Pic X(02).
       05  FIELD-2           Pic 9(02).
       05                    Pic X(02).
       05  FIELD-3           Pic X(02).
       05  FIELD-4           Pic 9(02).

  Only the Named fields, in this example FIELD-1, FIELD-2, FIELD-3,
& FIELD-4, are initialized.  The FILLER and implied FILLER fields
are left at what ever value the compiler decides on.  This can be
junk or Nulls depending on what version of the compiler you are
using.  That last few versions we have gotten here favor Nulls.