I just stumbled upon Bulletin Messages which is exactly what I was looking for.
Manager » User interface » Bulletin Messages » Add new
Its obvious how to use it -- just curious why this was not documented. (I searched docs for "bulletin messages" which returned nothing.)
splunk-base.splunk.com/answers/10740/splunk-login-page-banner
I just stumbled upon Bulletin Messages which is exactly what I was looking for.
Manager » User interface » Bulletin Messages » Add new
Its obvious how to use it -- just curious why this was not documented. (I searched docs for "bulletin messages" which returned nothing.)