The following code can be added to an individual module. This code can be applied to all the landing pages through appropriate Assignments.
<div id="static-totop">
<div class="g-content g-particle">
<div class="static-totop g-particle">
<div class="g-totop">
<a href="#" id="totop" rel="nofollow">
<i class="fa fa-arrow-circle-o-up"></i>
</a>
</div>
</div>
</div>
</div>