Library /sys$common/syshlp/DTM$DW_HELPLIB.HLB  —  overview  set_up, des_lib, create_lib
  To create a new DTM library, you must first create an
  empty OpenVMS directory for the library, then perform
  the following steps:

  1. Pull down the Library menu.

  2. Choose the Create... menu item.

  The Create Library dialog box enables you to specify
  all the attributes for the new library. The created
  library automatically becomes the current DTM library.
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