silverstripe-cms/templates/Includes/AssetAdmin_left.ss

<h2><% _t('FOLDERS','Folders') %></h2>
	<div id="treepanes" style="overflow-y: auto;">
			<ul id="TreeActions">
				<li class="action" id="addpage"><button><% _t('CREATE','Create') %></button></li>
				<li class="action" id="deletepage"><button><% _t('DELETE','Delete') %></button></li>
				<li class="action" id="filesystemsync">
					<button title="<% _t('FILESYSTEMSYNC_DESC', 'SilverStripe maintains its own database of the files &amp; images stored in your assets/ folder.  Click this button to update that database, if files are added to the assets/ folder from outside SilverStripe, for example, if you have uploaded files via FTP.') %>">
						<% _t('FILESYSTEMSYNC','Look for new files') %>
					</button>
				</li>
			</ul>
			<div style="clear:both;"></div>
			<form class="actionparams" id="addpage_options" style="display: none" action="admin/assets/addfolder">
				<div>
				<input type="hidden" name="ParentID" />
				<input class="action" type="submit" value="<% _t('GO','Go') %>" />
				</div>
			</form>
		
			$DeleteItemsForm
		
			<form class="actionparams" id="sortitems_options" style="display: none">
				<p id="sortitems_message" style="margin: 0"><% _t('TOREORG','To reorganise your folders, drag them around as desired.') %></p>
			</form>
			<div class="checkboxAboveTree">
					<input type="checkbox" id="sortitems" /> <label for="sortitems"><% _t('ENABLEDRAGGING','Allow drag &amp; drop reordering', PR_HIGH) %></label>
			</div>
		
			$SiteTreeAsUL
	</div>