/sys$common/syshlp/helplib.hlb FORTRAN, /SHOW  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /SHOW[=(option[,...])]      D=/SHO=(NODAT,NODIC,NOINC,NOL,MAP,NOPRE,SIN)

  Controls listing file options.

  The /SHOW qualifier is ignored if /LIST is not specified, either
  explicitly or by default.  The /SHOW=NOMAP qualifier is ignored if
  /CROSS_REFERENCE is specified.

  Additional Information (explode) :

• DATA_DEPENDENCES
• DICTIONARY
• INCLUDE
• LOOPS
• MAP
• PREPROCESSOR
• SINGLE
• ALL
• NONE