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

  $ LIBRARY/COMPRESS=(KEYSIZE:40,MODULES:80)/TEXT SOURCE

      This LIBRARY command creates a new version of the text library
      SOURCE.TLB. Space left after modules were deleted from the old
      version is recovered in the new version. The new version can
      contain up to 80 modules; the maximum length of module names in
      the new version is 40.