In this example, EXPAND statements add a 250-byte patch area (initialized to zeros) at the end of control section CSECT1 and increase the length of named common area COM1 by 400 bytes.

//LKED       EXEC   PGM=IEWBLINK
//SYSPRINT   DD     SYSOUT=*
//SYSLMOD    DD     DSNAME=PROJECT.PROGLIB,DISP=OLD
//SYSLIN     DD     DSNAME=&&LOADSET,DISP=(OLD,PASS)
//           DD     *
  EXPAND            CSECT1(250)
  EXPAND            COM1(400)
  NAME              MOD1(R)
/*