The logical name definitions retrieved from the context file
    specified in the Context File field of the main window are
    displayed in the Logical Names/Equivalence Strings field of this
    dialog box.

    The effects of clicking on the dialog buttons are as follows:

    o  Conceal Translation - to specify that the translation(s) of
       the logical name are `concealed'.

    o  Enter Definition - to add the logical name and corresponding
       equivalence strings specified in the Logical Name and
       Equivalences fields to the Logical Names/Equivalence Strings
       list shown in the dialog box.

       Use this feature to supersede a definition from a parent
       context.

    o  Enter Deassign - to enter a deassign logical name specified
       in the logical name field to the Logical Names/Equivalence
       Strings list. The contents of the Equivalence string field are
       ignored.

       Use this feature in a context to supersede a definition from a
       parent context.

       The DECset Environment Manager does not allow duplicate
       definitions of a logical name in the Logical Names/Equivalence
       Strings field.

    o  Remove - to remove the selected logical name definition or the
       DEASSIGN from the Logical Names/Equivalence Strings list.

    o  Add Table - to specify an option menu containing the options
       system, group, job, the default setting, process, or other
       user defined tables.

       The value indicates the logical name table into which the
       logical name is inserted or from which the logical name is
       deassigned.

    o  OK - to dismiss the dialog box and write changes made to the
       current context.

       The current changes are not written to the context file until
       after you either Apply or Save these changes. Changes are
       written to the current context in memory only.

    o  Cancel - to dismiss the dialog box, discarding current changes
       made.

    o  Help - to bring up a help window containing text describing
       the dialog box.

    The Logical Names/Equivalence Strings field places equivalence
    strings on separate lines in order to distinguish between
    logicals defined; for example:

        DEFINE FOO BAR
        DEFINE MOO A,B,C
        DEASSIGN ZOO

    The Environment Manager does not accept logical name
    specifications that include quotation marks.