You can set the info bar shown by default for portlets of a portal by adding a property for the portal-config configuration in the portal.xml file.
<properties>
<entry key="showPortletInfo">1</entry>
</properties>
There are two values for "showPortletInfo": 0 and 1. If the value is 1, the info bar of portlets is shown by default. If the value is 0, it is not.