Library /sys$common/syshlp/dtm$dw_helplib.hlb overview, basics  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Information about using DECwindows, such as how to
  manage windows, and how to use dialog boxes and scroll
  bars, is available from Session Manager help.

  To get Session Manager help, perform the following
  steps:

  o  Pull down the Help menu from the Session Manager
     window.

  o  Choose the Overview menu item. The Overview help
     topic provides details about using DECwindows.