The timeout notification that appears in the header of Studio can be controlled by the session.timeout property in portal-ext.properties.
By default, the portal-ext.properties file does not have the session.timeout property. Instead, the default timeout value is set in the web.xml file (which is in endeca-portal.war), on the WebLogic Server that is running Studio. The session.timeout property, when added to portal-ext.properties, will override the web.xml setting.
To modify the Studio session timeout value: