The JSM's Show Comment Metadata plugin displays comment meta keys and their unserialized values in a metabox at the bottom of comment editing pages.
The current user must have the WordPress manage_options capability (allows access to administration options) to view the Comment Metadata metabox, and the manage_options capability to delete individual meta keys.
The default manage_options capability can be modified using the 'jsmscm_show_metabox_capability' and 'jsmscm_delete_meta_capability' filters (see filters.txt in the plugin folder).
There are no plugin settings - simply install and activate the plugin.
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