energylink/public/app/plugins/panel/text/editor.html

<div class="gf-form-group">
	<div class="gf-form-inline">
		<div class="gf-form">
			<span class="gf-form-label">Mode</span>
			<span class="gf-form-select-wrapper">
				<select class="gf-form-input" ng-model="ctrl.panel.mode" ng-options="f for f in ['html','markdown']"></select>
			</span>
		</div>
	</div>
</div>

<h3 class="page-heading">Content</h3>

<span ng-show="ctrl.panel.mode == 'markdown'">
	(This area uses <a target="_blank" href="http://en.wikipedia.org/wiki/Markdown">Markdown</a>. HTML is not supported)
</span>

<div class="gf-form-inline">
	<div class="gf-form gf-form--grow">
		<code-editor content="ctrl.panel.content" rows="20" on-change="ctrl.render()" data-mode="markdown" code-editor-focus="true">
		</code-editor>
	</div>
</div>