grafana/public/app/plugins/datasource/graphite/partials/annotations.editor.html

<div class="gf-form-group">
  <div class="gf-form">
    <span class="gf-form-label width-12">Graphite query</span>
    <input type="text" class="gf-form-input" ng-model='ctrl.annotation.target' placeholder="Example: statsd.application.counters.*.count"></input>
  </div>

	<h5 class="section-heading">Or</h5>

  <div class="gf-form">
    <span class="gf-form-label width-12">Graphite events tags</span>
    <input type="text" class="gf-form-input" ng-model='ctrl.annotation.tags' placeholder="Example: event_tag_name"></input>
  </div>
</div>