Michael,
Sorry for a late reply.
You can define it almost anywhere. On a widget level, page, etc
There are two parts that have to have a matching ID. First is on the <button> element and second on a modal (check red highlight)
You chose ID name, but they have to match. If you have more them one modal, you have to have more unique IDs
<!-- Buttons trigger modal -->
<div class="sticky-btn">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#Feedback">Feedback</button>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#Help">Help</button>
</div>
<!-- Feedback Modal -->
<div class="modal fade" id="Feedback" tabindex="-1" role="dialog" aria-labelledby="Feedback">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Feedback</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Submit</button>
</div>
</div>
</div>
</div>
Hope this helps
