paesaggistica/liferay-plugins-sdk-6.2/portlets/portos-firma-portlet/docroot/WEB-INF/liferay-display.xml

<?xml version="1.0"?>
<!DOCTYPE display PUBLIC "-//Liferay//DTD Display 6.2.0//EN" "http://www.liferay.com/dtd/liferay-display_6_2_0.dtd">

<display>
	<category name="category.portos">
		<category name="category.tools">
			<portlet id="firma"></portlet>
		</category>
	</category>
</display>