~u message is addressed to a subscribed mailing list
~v message is part of a collapsed thread.
~x \fIEXPR\fP messages which contain \fIEXPR\fP in the \(lqReferences\(rq field
+~X \fIMIN\fP-\fiMAX\fP messages with MIN to MAX attachments
~z \fIMIN\fP-\fIMAX\fP messages with a size in the range \fIMIN\fP to \fIMAX\fP
~= duplicated messages (see $duplicate_threads)
~$ unreferenced message (requries threaded view)
.PP
In the above, \fIEXPR\fP is a regular expression.
.PP
-With the \fB~m\fP, \fB~n\fP, and \fB~z\fP operators, you can also
+With the \fB~m\fP, \fB~n\fP, \fB~X\fP and \fB~z\fP operators, you can also
specify ranges in the forms \fB<\fP\fIMAX\fP, \fB>\fP\fIMIN\fP,
\fIMIN\fP\fB-\fP, and \fB-\fP\fIMAX\fP.
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