.RS 5
.nf
.ta +\w'\fIName\fP 'u
-.I Name Description
+.I "Name Description
first the first message in the folder
last the last message in the folder
cur the most recently accessed message
.SS "Sequence Negation"
.B Nmh
-provides the ability to select all messages not elements of a
-user-defined sequence. To do this, the user should define the entry
+provides the ability to select all messages
+.B not
+elements of a user-defined sequence.
+A special string is used to preface an existing user-defined
+sequence name. This specification then refers to those
+messages not elements of the specified sequence name.
+The default negation prefix is the exlamation mark `!',
+but it may be change to any string, by defining the entry
\*(lqSequence\-Negation\*(rq in the
.B nmh
-profile file; its value
-may be any string. This string is then used to preface an existing
-user-defined sequence name. This specification then refers to those
-messages not elements of the specified sequence name. For example, if
-the profile entry is:
+profile file.
+For example, if the profile entry is:
.PP
.RS 5
Sequence\-Negation: not
.PP
Obviously, the user should beware of defining sequences with names that
begin with the value of the \*(lqSequence\-Negation\*(rq profile entry.
+The default value `!' was chosen due to its similar meaning in the C
+programming language, and because it cannot be part of a user-defined
+sequence. But if your shell provides history expansion,
+you might need to quote the exlamation mark (prefix it with a backslash).
+.PP
+To deactivate the negation mechanism, define Sequence\-Negation in your
+profile to an empty value.
.SS "The Previous Sequence"
.B Nmh
.BR inc ,
.BR rcvstore ,
.BR show ,
-.BR mhshow ,
and
.B flist
honor the sequence.
.PP
Similarly, whenever
.BR show ,
-.BR mhshow ,
.BR next ,
or
.B prev