{% block preview %}
	<div class="row">
		<div class="col-md-4">{{block.preview_region('side_column_lf')}}</div>
		<div class="col-md-4">{{block.preview_region('main_column')}}</div>
		<div class="col-md-4">{{block.preview_region('side_column_rg')}}</div>
	</div>
{% endblock %}