Library /sys$common/syshlp/DBG$HELP.HLB  —  DEBUG  EXTRACT  Description
    When you use the EXTRACT command to save the contents of a
    display into a file, only those lines that are currently stored
    in the display's memory buffer (as determined by the /SIZE
    qualifier on the DISPLAY command) are written to the file.

    You cannot extract the PROMPT display into a file.

    Related commands:

       DISPLAY
       SAVE
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