AddThis for facebook, twitter, email: create a block with CSS class "addthis" and Block body:
<!-- AddThis Button BEGIN -->
<div class="addthis_toolbox addthis_floating_style addthis_16x16_style">
<a class="addthis_button_facebook_follow" addthis:userid="yalelibrary"></a>
<a class="addthis_button_twitter_follow" addthis:userid="yalelibrary"></a>
<a class="addthis_button_email"></a>
</div>
<script type="text/javascript">var addthis_config = {"data_track_addressbar":false};</script>
<script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-5034cdc446677019"></script>
<!-- AddThis Button END -->
Arts Search Area Links => Point to "Arts main Menu - Search Area" with CSS class of "search-area-links narrow-or-greater" to change the default search blocks at "Header First" Region