Documentation missing about iView properties of com.sap.portal.masthead

Hi,

I configure the available links in the portal masthead. When switching "Show Link in Masthead: Help Center" (property ID: ShowHelpCenterLink) from "No" to "Yes" I get the link "Help Center" in the portal header, but when clicking the link nothing happens.

Is there any documentation how to use/implement this feature?

Best regards,

Johannes