app/views/capture/_intro.html.erb
<div class="modal fade" id="intro">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<b>Use a fluorescent bulb spectrum to calibrate your spectrometer</b>
</div>
<div class="modal-body">
</div>
<div class="modal-footer">
<a data-dismiss="modal" class="btn-large btn-primary" href="javascript:void();">Cancel</a>
se existing calibration</a>
</div>
</div>