I checked the box
QuoteDisplay this notice to users not allowed to view full-size photos :
etc
I tested it out by logging out. I don't see any notice...?
Nevermind, I figured it out. Its show in the mouse over. Still, while its useful I want to make it more obvious...? But I have a message under my banner saying so in bold letters, so I s'pose thats good enough :)
Thanks for coming back to close out your issue.
Please note that your question does not pertain to core Coppermine code, but to a plugin: http://forum.coppermine-gallery.net/index.php?topic=25010.0
I don't know if you forgot that it was from the plugin, but in the future, please keep questions about plugins in their threads.
About the message, I don't see why it needs to be more obvious. It only applies to people who are interested in viewing the full sized image. If people aren't interested or are unaware, why should they have to see the message? It just detracts from the gallery.