-.IP "\fBdump\-flows\fR [\fIdp\fR]"
-Prints to the console all flow entries in datapath \fIdp\fR's
-flow table. If \fIdp\fR is not specified and exactly one datapath
-exists, the flows for that datapath will be printed.
+.PP
+The \fIdp\fR argument to each of these commands is optional when
+exactly one datapath exists, in which case that datapath is the
+default. When multiple datapaths exist, then a datapath name is
+required.
+.
+.IP "[\fB\-m \fR| \fB\-\-more\fR] \fBdump\-flows\fR [\fIdp\fR] [\fBfilter=\fIfilter\fR]"
+Prints to the console all flow entries in datapath \fIdp\fR's flow
+table. Without \fB\-m\fR or \fB\-\-more\fR, output omits match fields
+that a flow wildcards entirely; with \fB\-m\fR or \fB\-\-more\fR,
+output includes all wildcarded fields.
+.IP
+If \fBfilter=\fIfilter\fR is specified, only displays the flows
+that match the \fIfilter\fR. \fIfilter\fR is a flow in the form similiar
+to that accepted by \fBovs\-ofctl\fR(8)'s \fBadd\-flow\fR command. (This is
+not an OpenFlow flow: besides other differences, it never contains wildcards.)
+The \fIfilter\fR is also useful to match wildcarded fields in the datapath
+flow. As an example, \fBfilter='tcp,tp_src=100'\fR will match the
+datapath flow containing '\fBtcp(src=80/0xff00,dst=8080/0xff)\fR'.
+.
+.IP "\fBadd\-flow\fR [\fIdp\fR] \fIflow actions\fR"
+.IQ "[\fB\-\-clear\fR] [\fB\-\-may-create\fR] [\fB\-s\fR | \fB\-\-statistics\fR] \fBmod\-flow\fR [\fIdp\fR] \fIflow actions\fR"
+Adds or modifies a flow in \fIdp\fR's flow table that, when a packet
+matching \fIflow\fR arrives, causes \fIactions\fR to be executed.