TOPIC: HTML Overrides file list

Hello, would be really handy to have a reference guide to know what file controls what aspect.

For now, what I need to know is what file controls the HEADER of the registration screen (individual). Where the event title goes.

I thought it was just simply "html/com_dtregister/event/event_header.php" but it doesn't seem to have any effect.

However when I modify the corresponding core file it does.

Advice please.