OCPBUGS-20159: Document how to enable LSO metrics after installation

Author: dobsonj

Diff for: modules/persistent-storage-local-metrics.adoc

@@ -19,8 +19,13 @@
 
 * `lso_lv_provisioned_PV_count`: total number of provisioned PVs for `LocalVolume`
 
-To use these metrics, be sure to:
+To use these metrics, enable them by doing one of the following:
 
-* Enable support for monitoring when installing the Local Storage Operator.
+* When installing the Local Storage Operator from _OperatorHub_ in the web console, select the _Enable Operator recommended cluster monitoring on this Namespace_ checkbox.
 
-* When upgrading to {product-title} 4.9 or later, enable metric support manually by adding the `operator-metering=true` label to the namespace.
+* Manually add the `openshift.io/cluster-monitoring=true` label to the Operator namespace by running the following command:
++
+[source,terminal]
+----
+$ oc label ns/openshift-local-storage openshift.io/cluster-monitoring=true
+----