I'm trying to follow the example here
How is possible show by default the panel closed?
You have to create your panel like this:
<div class="panel panel-default "> <div class="panel-heading "> <h3 class="panel-title">Panel 1</h3> <span class="pull-right clickable panel-collapsed"><i class="glyphicon glyphicon-chevron-down"></i></span> </div> <div class="panel-body collapse" style="display: none;"> Founded in 1892 and headquartered in Fairfield, CT, LexisNexis Corporate Affiliations is a technology and financial services company. The company offers products and services ranging from aircraft engines, power generation, water processing, and household appliances, among others. It operates in business segments including Energy Infrastructure, Aviation, Healthcare, Transportation, Home & Business Solutions, and GE Capital. The company also provides medical imaging, business and consumer financing, and industrial products. It has presence in North America, Europe, Asia, South America, and Africa. According to the company's current 10K government filing it had FYE 12/31/2011 revenue of $147.3 billion and has 301,000 employees. </div> </div>