I was updating a report when I noticed a link to 'advanced report configuration' (this was on release 5.13.5). Following that link I got a screen similar to the contact layout editor - but I couldn't make anything work. After an upgrade to 5.17.4 this link has disappeared. It looked very useful & interesting, allowing columns to have the title changed plus other stuff. I guess I stumbled on something that's not ready yet - or is this an extension I've missed? If not - any ideas when this will be implemented?